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A review of freshwater shrimps belonging to the genera Palaemonetes, Pseudopalaemon, Euryrhynchus and Acetes of the Colombian tributaries of the Amazon and Orinoco Rivers is presented. The species found in this work are recorded for the first time for Colombia: Palaemonetes ivonicus Holthuis, 1950, Palaemonetes mercedae Pereira, 1986, Pseudopalaemon amazonensis Ramos-Porto, 1979, Pseudopalemon chryseus Kensley & Walker, 1982, Euryrhynchus amazoniensis Tiefenbacher, 1978 and Acetes paraguayensis Hansen, 1919. Diagnoses, illustrations, distributional data and a key to the families, genera and species are presented. Se presenta una revisión de los camarones de agua dulce de los géneros Palaemonetes, Pseudopalaemon, Euryrhynchus y Acetes de los afluentes de los ríos Amozonas y Orinoco de Colombia. Las especies registradas en este trabajo constituyen los primeros registros para Colombia: Palaemonetes ivonicus Holthuis, 1950, Palaemonetes mercedae Pereira, 1986, Pseudopalaemon amazonensis Ramos-Porto, 1979, Pseudopalemon chryseus Kensley & Walker, 1982, Euryrhynchus amazoniensis Tiefenbacher, 1978 y Acetes paraguayensis Hansen, 1919. Se presentan las diagnosis, las ilustraciones, los datos sobre distribución y una clave para las familias, géneros y especies.

Macrobrachium americanum Bate, 1868 Fig. 3 A���C Macrobrachium americanum Bate, 1868: 363. Macrobrachium americanum, Holthuis, 1952: 128.��� Prahl et al., 1978: 55.��� M��ndez, 1981: 73.��� Rodr��guez, 1981: 47.��� Prahl et al., 1984: 47.��� Abele & Kim, 1989: 5.��� Wicksten, 1989: 13. (For detailed synonymy refer to Holthuis, 1952). Material examined Cauca: Guapi. Gorgona Island. Jan - Feb 1961, leg. F. Medem, 2 males, 3 females, 1 ovigerous, ICN- MHN-CR 0 0 0 1 - 0005.��� Gorgona Island, 20 May 1979, 1 male, CRBMUV 79034.��� Gorgona Island, 15, 18, 20 May 1986, leg. P. Cala, 3 males, 3 females, 1 ovigerous, ICN-MHN-CR 1807, 1808, 2116.��� Gorgona Island, Airport, in creek, 28 Mar 1980, 1 ovigerous female, CRBMUV 80001.��� Gorgona Island, La Azufrada stream, 25 May 1978, 1 male, 2 females, CRBMUV 78005.��� Temuey, Guapi River, 21 Oct 2004, leg. D. M. Valencia & M. R. Campos, 4 males, 9 females, ICN-MHN-CR 2185, 2186. Choc��: Ensenada de Utr��a. La Aguada, 17 Dec 1979, 2 ovigerous females, CRBMUV 79030.��� Bajo Baud��, Pepe River, 17 Jun 1979, leg. H. Prahl, 1 male, CRBMUV 79019.��� Pizarro, 8 Jul 1981, leg. N. Toro & M. Mar��n, 1 male, CRBMUV 81084. Valle del Cauca: Bah��a M��laga. in stream, 29 Dec 1985, leg. D. Garc��s, 1 male, CRBMUV 85197.��� La Alegr��a stream, 24 Dec 1985, 1 male, 3 females, CRBMUV 85068.��� Las Tres Mar��as, 30 Aug 1980, 1 male, 3 females, CRBMUV 80005.��� Las Tres Mar��as, 25 Nov 1985, leg. G. Ramos, 6 males, 2 females, CRBMUV 85182.��� Las Tres Mar��as, in creek, 8 Dec 1985, 3 females, CRBMUV 85067.��� Buenaventura, Dagua River, 19 Apr 2003, 3 males, 2 females, Universidad de los Andes.��� Cajambre River, Caimancito, 12 Aug 1983, 2 males, 3 females, CRBMUV 83004.��� Dagua, Dagua River, 750 m asl, 22 Nov 1995, 2 males, ICN- MHN-CR 1597. Diagnosis Rostrum lanceolate, apex curved upward, as long as or shorter than antennular peduncle, upper margin with 10 to 13 teeth spaced regularly, including 3-5 teeth completely post orbital, lower margin 2 to 5 teeth; carapace smooth; abdomen smooth; telson terminal margin ending semicircular with one pair of internal and external reduced spines, not overreaching terminal margin of telson. First pair of pereopods overreaching scaphocerite with 3 / 4 of carpus. Second pair of pereopods elongated, prominent, similar in shape and size, overreaching scaphocerite with 1 / 3 to 1 / 2 of merus; merus 1.09 to 1.12 x longer than carpus, and 0.53 to 0.62 x palm length; carpus 2.04 to 2.34 x as long as wide and 0.50 to 0.55 x palm length; palm prominent, 3.25 to 4.74 x as long as wide, 2.60 to 3.54 x as long as high; fingers 0.87 to 1.0 x palm length, gaping when closed, a prominent tooth on midcutting edge of mobile finger, and another one on proximal portion of cutting edge of fixed finger, usually followed by 3 to 4 denticles on each base of finger. Size. The largest male TL 220.7 mm, CL 68.4 mm; the largest female, TL 152.1 mm, CL 47.6 mm; 5 ovigerous females were examined: TL 75.0 to 152.1 mm, CL 21.6 to 47.6 mm, with small and numerous eggs. Remarks This species is most similar to Macrobrachium carcinus ( Linn��e, 1758), sometimes it is difficult to differentiate specimens of these two species. For this reason, Holthuis (1952) suggested that these two species should be considered as subspecies. However, in the Colombian material we found that these two species have differences in the length of the fingers of the second pair of pereopods: the fingers in M. americanum are as long as or slightly shorter than the palm, whereas they are slightly longer than the palm in M. carcinus. The species M. americanum was reported from Escalerete River, department of Valle del Cauca and the specimens were deposited at the CRBMUV by Prahl et al. (1984). In a recent examination of Prahl et al ���s material at the CRBMUV the specimens could not be found., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 8-10, DOI: 10.5281/zenodo.176325, {"references":["Bate, C. S. (1868) On a new Genus, with four new Species, of freshwater Prawns. Proceedings of the Zoological Society of London, 1868, 363 - 368.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Prahl, H., Grogl, M. & Guhl, F. (1978) Carideos (Decapodos, Natantia, Palaemonidae) de Gorgona. Cespedesia, 7, 49 - 69.","Mendez, M. (1981) Claves de identificacion y distribucion de los langostinos y camarones (Crustacea: Decapoda) del mar y rios de la costa del Peru. Boletin del Instituto del Mar, Callao, Peru, 5, 1 - 170.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Prahl, H., Caicedo, C. & Rios, R. (1984) Camarones Palaemonidos (Crustacea, Caridea, Palaemonidae) de agua dulce y salobre del Departamento del Valle del Cauca. Cespedesia, 13, 45 - 58.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Wicksten, M. K. (1989) A Key to the Palaemonid Shrimp of the Eastern Pacific Region. Bulletin Southern California Academy of Science, 88, 11 - 20.","Linnee, E. C. (1758) Systema Naturae per regna tria Naturae, secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis, Ed. 10, 1, 1 - 824."]}

Macrobrachium brasiliense (Heller, 1862) Fig. 4 A���D Palaemon brasiliensis Heller, 1862: 419. Macrobrachium brasiliense, Holthuis, 1952: 79.��� Rodr��guez, 1981: 47.��� Rodriguez, 1982: 382.��� Magalh��es & Walker, 1988: 279.��� Pereira, 1993: 343.��� L��pez & Pereira, 1996: 53.��� Campos, 1997: 237.��� Magalh��es, 2002: 1096.��� Melo, 2003: 346.��� Garc��a - D��vila & Magalh��es, 2004: 667. (For detailed synonymy refer to Holthuis, 1952). Material examined Amazonas: Leticia. Corregimiento La Pedrera, Chorro de C��rdoba, 100 m asl, 8 Nov 1994, leg. M. R. Campos, 60 males, 27 females, 2 ov��gerous, 16 juveniles, ICN-MHN-CR 1395.��� Leticia - Tarapac��, km 11, in creek, 30 Apr 1999, leg. F. Arbel��ez, 11 males, 6 females, ICN-MHN-CR 1791.��� Leticia-Tarapac��, Tacana stream, affluent of Amazon River, 80 m asl, 10, 14 Dec 2003, leg. C. Pinto, 8 males, 9 females, 30 juveniles, ICN-MHN-CR 2205. ��� Puerto Nari��o. in creek, 3 Jan 1972, leg. H. Harima & H. T. Boschung, 7 males, 8 females, 1 ov��gerous, 2 juveniles, ICN-MHN-CR 0034.��� May 1957, leg. Nic��foro Mar��a, 5 males, 1 female, MLS 10.��� Amacayacu Park, 1 female, Universidad de los Andes. Arauca: Ca��o Lim��n, Agua Verde Lake, 125 m asl, 15 Aug 1991, leg. G. Galvis, 11 males, 7 females, ICN-MHN-CR 1755. Boyac��: San Luis de Gaceno, Sardinita stream, 300 m asl, 28 - 29 Dec 1996, leg. R. Casallas & A. J. Bernal, 2 males, MLS 16. Caquet��: Araracuara, Administraci��n stream, 19 Nov 1982, leg. M. R. Campos, 2 males, ICN-MHN-CR 0097.��� Monta��itas, Vereda Palma Azul, near School, 320 m asl, 9 Apr 1990, leg. R. Restrepo, 2 specimens without pleopods, ICN-MHN-CR 1197. Casanare: Agua Azul. Cayaguaro stream, 20 Nov 1982, leg. M. R. Campos, 4 males, 1 ov��gerous females, ICN-MHN-CR 0 502. Cundinamarca: Medina. Vereda Brisas del Humea, Choapal stream, affluent of Humea River, 350 m asl, 21 Oct 1989, leg. M. R. Campos, 7 males, 7 females, 4 ovigerous, ICN-MHN-CR 1137.��� Gazamancito River, 500 m asl, 27 Jul 1986, leg. R. Restrepo, 1 male, 1 female, ICN-MHN-CR 0647.��� La Arenosa creek, 300 m asl, 29 Jul 1986, leg. R. Restrepo, 2 males, 2 females, 1 without pleopods, ICN-MHN-CR 0648.��� Vereda La Sarza, La Sarza stream, 400 m asl, 21 Oct 1989, leg. M. R. Campos, 22 males, 22 females, 8 ov��gerous, ICN-MHN-CR 1138. Meta: Acac��as. Castilla, stream, Castilla-Chidrimene Highway, 510 m asl, 20 Apr 2004, leg. E. Fl��rez, 20 males, 15 females, 5 juveniles ICN-MHN-CR 2178.��� Centro Araguaney, Siete Vueltas stream, 514 m asl, 22 Apr 2004, leg. E. Fl��rez, 15 males, 5 females, 5 juveniles ICN-MHN-CR 2179.��� Acac��as River, 500 m asl, 18 Apr 2004, leg. E. Fl��rez, 2 females, ICN-MHN-CR 2180.��� Cumaral. Carnicer��as creek, 400 m asl, 30 Apr 1995, leg. G. Galvis, 1 male, 1 female, ICN-MHN-CR 1463.��� Pacuca creek, 400 m asl, 23 Oct 1994, leg. M. R. Campos, 1 male, 1 ov��gerous female, ICN-MHN-CR 1364.��� El Paraiso farm, 450 m asl, 6 May 1988, leg. M. R. de Campos, 23 males, 9 females, 2 juveniles, ICN-MHN-CR 0866.��� El Paraiso Farm, in creeck, 450 m asl, 7 May 1988, leg. G. Galvis, 21 males, 35 females, 1 ov��gerous, ICN-MHN-CR 0868.��� La Y stream, 550 m asl, 9 Oct 1990, leg. M. R. Campos, 4 males, 7 females, 4 ov��ferous, ICN-MHN-CR 1212.��� Vereda El Palmar, Caibe creek, 550 m asl, 25 Oct 1994, leg. M. R. Campos, 8 males, 2 females, 1 ov��gerous, ICN-MHN-CR 1368.��� Vereda El Palmar, Mata de Guadua creek, 400 m asl, 27 Oct 1994, leg. M. R. Campos, 2 males, 2 females, ICN-MHN-CR 1372.��� El Dorado, Inspecci��n San Isidro del Ariari, Vereda La Isla, Aguas Arcas stream, 470 m asl, 21 Nov 1995, leg. M. R. Campos, 8 males, 6 females, 2 ov��gerous, ICN- MHN-CR 1543.��� Vereda Santa Rosa, Paujil creek, 530 m asl, 11 Jun 1996, leg. M. R. Campos, 4 males, ICN-MHN-CR 1591.��� La Uribe, La Cunsia stream, 480 m asl, 25 Nov 1987, leg. P. Cala, 12 males, 25 females, 1 juvenile, ICN-MHN-CR 0876.��� Mesetas, Jard��n de las Pe��as, Las Pe��as stream, affluent of Sausa River, 24 Nov 1987, leg. P. Cala, 59 males, 47 females, 22 ovigerous, 6 juveniles, ICN-MHN-CR 1745, 1746, 1820.��� Vereda San Isidro, El Almendro Farm, Pailas creek, affluent of Duda River, 480 m asl, 9 Feb 1988, leg. P. Cala, 2 males, ICN-MHN-CR 0879.��� Puerto Gait��n, Vereda. San Miguel, Miti-Miti creek, 130 m asl, 17 Jun 1996, leg. M. R. Campos, 14 males, 8 females, 3 ov��gerous, ICN-MHN-CR 1592.��� Puerto L��pez, Cafam Llanos, Mata-Mata Lake, 180 m asl, 20 Mar 2004, leg. M. Leyva, 1 male, 11 juveniles, ICN-MHN-CR 2181, 2206.��� Restrepo, Vereda Caney Alto, El Horizonte Farm, 750 m asl, 12 Oct 1990, leg. M. R. Campos, 8 males, 4 females, ICN-MHN-CR 1216.��� Vereda Caney Alto, dike in Seminar, 700 m asl, 11 Oct 1990, leg. M. R. Campos, 14 males, 7 females, 1 ovigerous, ICN-MHN-CR 1214.��� Vereda Caney Bajo, 480 m asl, 29 Oct 1994, leg. M. R. Campos, 6 males, 5 females, 1 ov��gerous, ICN-MHN-CR 1375.��� Vereda Caney Bajo, San Ignacio creek, affluent of Caney River, 300 m asl, 31 Oct 1997, leg. J. Alvarez, 6 males, 1 female, ICN- MHN-CR 1672.��� Vereda Caney Bajo, San Miguel creek, 450 m asl, 29 Apr 1988, leg. M. R. Campos, 30 males, 25 females, 14 juveniles, ICN-MHN-CR 0857.��� Vereda Caney Bajo, San Miguel creek, 350 m asl, 20 Apr 1989, leg. M. R. Campos, 13 males, 8 females, ICN-MHN-CR 0952.��� Vereda Caney Bajo, Pilatos stream, 350 m asl, 24 Mar 1984, leg. M. R. Campos, 1 male, 3 females, 1 ov��gerous, ICN-MHN-CR 0556.��� San Juan de Arama. Vereda La Cur��a, Estaci��n del Inderena, La Cur��a creek, 500 m asl, 20, 21, 23 Sep 1987, leg. M. R. Campos, 30 males, 16 females, ICN-MHN-CR 0 809, 0 811, 0814.��� Serran��a La Macarena, Duda Canyon, 1990, 1 male, Universidad de los Andes. ��� Villavicencio. San Antonio creek, alt 450 m asl, 24 Mar 1974, leg. I. Berr��o, 27 males, 16 females, 5 ov��gerous, ICN-MHN-CR 0059.��� South of Villavicencio, 1 male, MLS 3.��� Villavicencio, Jan 1930, 1 male, 4 females, 3 ov��gerous, MLS 5.��� Villavicencio, Jul 1935, 5 males, 10 females, 1 ov��gerous, MLS 6.��� Villavicencio, Jan 1953, leg. Nic��foro Mar��a, 1 male, MLS 7. Norte de Santander: Toledo, El Sarare, El Porvenir Farm, 1600 m asl, 15 Dec 1971, leg. A. Rodriguez, 1 male, 3 females, 2 ov��ferous, ICN-MHN-CR 1471.��� El Sarare, El Porvenir Farm, 15 Dec, 1971, leg. A. Rodr��guez & R. G��evara, 4 males, 8 females, 1 ovigerous, MLS 11. Putumayo: Orito, 800 m asl, 15 May 2004, leg. C. A. Cipamocha, 4 males, 1 juvenil, ICN-MHN-CR 2207.��� Villagarz��n, Alto de Chalguayaco, 400 m asl, 15 May 1998, leg. L. A. N����ez, 1 male, ICN-MHN- CR 1707. Diagnosis Rostrum straight, distal portion slightly curved downward, as long as or slightly shorter than scaphocerite, upper margin with 7 to 12 teeth regularly spaced, including 1-4 teeth completely post orbital, lower margin 2 to 5 teeth; carapace covered with spinules on anterolateral surface; abdomen with low region of pleurae pubescent; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 1 / 2 to 3 / 4 of carpus. Second pair of pereopods elongated, covered with spines, which are prominent on ventral surface, similar in shape, slightly different in size, the larger pereopod overreaching scaphocerite with 1 / 4 of merus; merus 0.75 to 0.81 x carpus length, 0.52 to 0.57 x palm length; carpus, 2.73 to 4.24 x as long as wide and 0.66 to 0.75 x palm length; palm subcylindrical with rows of spines, of similar size, on internal margin, 3.95 to 6.30 x as long as wide, 3.44 to 4.63 x as long as high; fingers gaping when closed, 0.45 to 0.63 x palm length, prominent tooth on midcutting edge of mobile finger, and another one on its proximal portion, between them usually a denticle; a tooth on midcutting edge of fixed finger usually followed by 5 denticles on its base. Size. The largest male TL 77.2 mm, CL 26.3 mm; the largest female TL 70.2 mm, CL 22.3 mm; 66 ovigerous females were examined: TL 34.1 to 61.6 mm, CL 9.1 to 18.4 mm, with large and few number of eggs. Remarks This species is most similar to Macrobrachium nattereri (Heller, 1862). The two can be distinguished by differences in the second pair of pereopods in adult males. The palm in M. brasiliense is subcylindrical, more than 3 times as long as high, and the spines on the internal margin are of similar size, whereas it is swollen laterally, less than 3 times as long as high and the spines on the internal margin are of irregular size in M. nattereri; the fingers in M. brasiliense are usually less than 0.6 times the palm length, but they are longer than 0.6 times in M. nattereri. Macrobrachium brasiliense is also similar to M. ferreirai Kensley & Walker, 1982. The two can be distinguished by differences in the carapace and the second pair of pereopods in adult males. The anterolateral surface of the carapace in M. brasiliense is covered by spinules; to the contrary, it is smooth in M. ferreirai. The second pair of pereopods in M. brasiliense is more prominent than in M. ferreirai; the palm in M. brasiliense is less or equal to 6.3 times as long as wide, whereas it is more than 9 times as long as wide in M. ferreirai; the fingers in M. brasiliense are equal or more than 0.45 times the palm length, whereas in M., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 10-12, DOI: 10.5281/zenodo.176325, {"references":["Heller, C. (1862) Beitrage zur naheren Kentniss der Macrouren. Sitzungsberichten der Akademischen Wissenschtlichen Wien, 54, 389 - 426.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Rodriguez, G. (1982) Freshwater shrimps (Crustacea, Decapoda, Natantia) of the Orinoco basin and the Venezuelan Guayana. Journal of Crustacean Biology, 2, 378 - 391.","Magalhaes, C. & Walker, I. (1988) Larval development and ecological distribution of central amazonian Palaemonid shrimps (Decapoda, Caridea). Crustaceana, 55, 279 - 292.","Pereira, G. (1993) A description of a new species of Macrobrachium from Peru, and distributional records for Macrobrachium brasiliense (Heller) (Crustacea: Decapoda: Palaemonidae). Proceedings of the Biological Society of Washington, 106, 339 - 345.","Lopez, B. & Pereira, G. (1996) Inventario de los crustaceos decapodos de las zona alta y media del Delta de Rio Orinoco, Venezuela. Acta Biologica Venezuelica, 16:, 45 - 64.","Campos, M. R. (1997) Crustaceos, Decapodos. In: Instituto Geografico Agustin Codazzi (Ed.), Zonificacion Ambiental para el Plan Modelo Colombo-Brasilero (Eje Apaporis-Tabatinga: PAT). Edit. Linotipia Bolivar, 231 - 235.","Magalhaes, C. (2002) A rapid assessment of the decapod fauna in the Rio Tahuamanu and Rio Manuripi Basins, with new records of shrimps and crabs for Bolivia (Crustacea, Decapoda, Palaemonidae, Sergestidae, Trichodactylidae). Revista Brasileira de Zoologia, 19: 1091 - 1103.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Garcia-Davila, C. R. & Magalhaes, C. (2004) Revisao taxonomica dos camaroes de agua doce (Crustacea: Decapoda: Palaemonidae, Sergestidae) da Amazonia Peruana. Acta Amazonica, 33, 663 - 686.","Kensley, B. & Walker, I. (1982) Palaemonid shrimps from the Amazon Basin, Brazil (Crustacea: Decapoda: Palaemonidae). Smithsonian Contribution to Zoology, 362, 1 - 28."]}

Macrobrachium acanthurus (Wiegmann, 1836) Fig. 1 A���C Palaemon acanthurus Wiegmann, 1836: 150. Macrobrachium acanthurus, Holthuis, 1952: 45.��� Chace & Hobbs.��� 1969: 89.��� Chace, 1972: 20.��� Mart��nez, 1973: 5.��� Escobar, 1979: 105.��� Rodr��guez, 1980: 119.��� Rodr��guez, 1981: 45, 47.��� Williams, 1984: 66.��� Abele & Kim, 1989: 5.��� Nizinski, 2003: 103.��� Melo, 2003: 338. (For detailed synonymy refer to Holthuis, 1952). Material examined Atl��ntico: Ci��naga El Totumo, 18 Feb 1989, 1 female, Universidad de Antioquia. Bolivar: Mar��a La Baja. 23 Apr 2001, leg. A. Celis, 1 female, 4 juveniles, Universidad de Los Andes. C��rdoba: Pueblo Nuevo, Corregimiento Puerto Santo, Ci��naga El Porro, 120 m asl, 9 Jun 2004, leg. M. R. Campos, 3 females, 19 juveniles, ICN-MHN-CR 2137. ��� San Bernardo del Viento, Isla Queso, sea level, 7 Jun 2004, leg. M. R. Campos, 1 male, ICN-MHN-CR 2132. Choc��: Acand��. Acand�� River, 1986, 2 males, 1 ovigerous female, INV 4613.���Monomacho stream, 15 m asl, 29 Sep 1996, leg. S. Usme, 1 female, ICN-MHN-CR 1630. La Guajira: Riohacha. Guerrero River, 47 m asl, 27 Aug 1972, leg. P. Cala, 2 males, ICN-MHN-CR 0042.��� Rancher��a River, Nov 1975, 1 male, 3 females, 1 ovigerous, INV 978.��� Rancher��a River mouth, 40 m asl, 29 Nov 2003, leg. C. Castellanos, 2 males, 3 ovigerous females, ICN-MHN-CR 2165.��� Rancher��a River, 40 m asl, 6 Oct 2004, leg. P. S��nchez, 3 males, 3 females, 11 juveniles, ICN-MHN-CR 2208.��� Riohacha - Maicao Highway, 50 m asl, 26 Aug 1972, leg. P. Cala, 30 males, 17 females, ICN-MHN-CR 0 0 38, 0039.��� Riohacha 3 km southern, 50 m asl, 27 Aug 1972, leg. P. Cala, 2 females, ICN-MHN-CR 0040.��� Riohacha 20 km southern, 50 m asl, 27 Aug 1972, leg. P. Cala, 3 males, 6 females, 2 ovigerous, ICN-MHN-CR 0 0 41. Magdalena: Ci��naga, 21 Nov 1998, leg. R. Casallas & A. J. Bernal, 9 males, 14 females, 13 ovigerous, MLS 20, 21. ��� Santa Marta. Buritaca, 20 m asl, 17 Nov 1998, leg. R. Casallas & A. J. Bernal, 5 males, 6 females, 1 ovigerous, MLS 23.��� Nenguange stream, Dec 1976, 2 males, 4 females, 2 ovigerous, INV 972.��� Nenguange, 10 Apr 1979, leg. M. M. Criales, 1 male, INV 1444.��� Parque Nacional Natural Tayrona, Los Cedros, 10 Jul 1985, leg G. Galvis, 5 males, 3 females, ICN-MHN-CR 0 627. ��� Pozo Colorado, 29 Aug 1972, leg J. Thomerson & P. Cala, 3 males, ICN-MHN-CR 0 0 48. Sucre: Between Tol�� and Cove��as, Ci��naga La Caimanera, 24 May 1986, leg. M. L��pez, 1 male, 10 females, 1 ovigerous, ICN-MHN-CR 1466.��� Toluviejo, Pechil��n River, 60 m asl, 17 Jul 1986, leg. A. Rocha, 2 males, ICN-MHN-CR 0 646. Diagnosis Rostrum nearly sinuous, apex slightly curved upward, usually overreaching scaphocerite, upper margin with 8 to 12 teeth, proximal teeth with less recess between them than the distal ones, including 1-3 teeth completely post orbital, lower margin 4 to 7 teeth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with distal portion of carpus. Second pair of pereopods elongated, prominent, similar in shape and size, overreaching scaphocerite with total length of carpus, longitudinal rows of spines from ischium to palm; merus 0.70 to 0.73 x carpus length and 0.89 to 0.96 x palm length; carpus 6.85 to 7.34 x as long as wide and 1.26 to 1.31 x palm length; palm elongated, cylindrical, 5.62 to 6.26 x as long as wide; fingers thickly pubescent, 0.75 to 0.87 x palm length, not gaping when closed, a proximal tooth on each cutting edge of fingers, and series of denticles on each base of finger. Size. The largest male TL 126.6 mm, CL 34.5 mm; the largest female TL 121.4 mm, CL 30.3 mm; 28 ovigerous females were examined: TL 40.7 to 119.1 mm, CL 9.7 to 27.9 mm, with small and numerous eggs. Remarks This species is most similar to Macrobrachium rathbunae Holthuis, 1950. The two can be distinguished by differences in the rostrum and the second pair of pereopods. The rostrum in M. acanthurus overreaches the scaphocerite, whereas it is usually shorter than the scaphocerite in M. rathbunae. The palm of the second pair of pereopods in M. acanthurus is 5.62 to 6.26 x as long as wide, and the fingers 0.75 to 0.87 x the palm length, whereas the palm is 7.76 to 9.33 x longer than wide and the fingers are 0.43 to 0.47 x the palm length in M. rathbunae. In adult females and immature males the carpus of the second pair of pereopods is usually longer than the chela length. Some specimens of Macrobrachium acanthurus were found at INCODER collection: 9 males, the largest male was TL 167.2 mm, CL 43.8 mm; 7 females, 4 of them were ovigerous, the range of the ovigerous females are: TL 62.7 to 121.1 mm, CL 15.0 to 31.3 mm. These specimens were not included in this article because they lack location data. They may correspond to specimens reported by Mart��nez (1973) and deposited at INCODER., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 4-6, DOI: 10.5281/zenodo.176325, {"references":["Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Chace, F. A. & Hobbs, H. H. (1969) The freshwater and terrestrial Decapod Crustaceans of the West Indies with special reference to Dominica United States National Museum Bulletin, 292, 1 - 258.","Chace, F. A. (1972) The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a Summary of the West Indian. Shallow-water species (Crustacea: Decapoda: Natantia). Smithsonian Contributions to Zoology, 98, 1 - 179.","Martinez, L. E. (1973) Distribucion biogeografica de camarones de agua dulce del genero Macrobrachium Bate, 1868 (Crustacea, Palaemonidae) en el norte de Colombia. Divulgacion Pesquera, 4, 1 - 12.","Escobar, J. G. (1979) Carideos (Palaemonidae y Atyidae) en los rios de la region de Santa Marta. Anales del Instituto de investigaciones Marinas de Punta de Betin, 11, 97 - 133.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Williams, A. B. (1984) Shrimps, Lobster and Crabs of the Atlantic Coast of the Eastern. United States, Maine to Florida. Smithsonian Institution Press, 1 - 550.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Nizinski, M. S. (2003) Annotated checklist of decapod crustaceans of Atlantic coastal and continental shelf waters of the United Estates. Proceedings of the Biological Society of Washington, 116, 96 - 157.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Holthuis, L. B. (1950) Preliminary descriptions of twelve new species of Palemonid prawns from American waters (Crustacea Decapoda). Proceedings Koninklijke Nederlandische Akademie van Wetenschapen, 53, 93 - 99."]}

Macrobrachium surinamicum Holthuis, 1948 Fig. 19 A���C Macrobrachium surinamicum Holthuis, 1948: 24. Macrobrachium surinamicum, Holthuis, 1952: 57.��� Rodr��guez, 1980: 124.��� Rodr��guez, 1981: 47.��� Rodr��guez, 1982: 390.��� L��pez & Pereira, 1996: 52.��� Melo, 2003: 372. (For detailed synonymy refer to Holthuis, 1952). Diagnosis Rostrum straight with apex directed slightly upward, as long as scaphocerite, upper margin with 13 to 16 teeth, including 3-4 teeth completely post orbital, proximal teeth with less recess between them than distal ones, lower margin 4 to 6 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with distal extreme of carpus or total length of chela. Second pair of pereopods prominent, similar in shape and size, overreaching scaphocerite with total length of carpus; merus slightly shorter than carpus; carpus 0.5 x chela length; palm elongated and cylindrical, more than 5 x as long as wide; fingers thickly pubescent, not gaping when closed, 0.57 x palm length, two prominent teeth on proximal portion of cutting edge of mobile finger, followed by denticles to distal extreme; a prominent tooth on cutting edge of fixed finger, located between mobile finger teeth���s, followed by denticles to distal extreme. The females have small and numerous eggs. The diagnosis is based in (Holthuis, 1952). Remarks We did not find specimens of this species in the museums examined in this study. The only record for Colombia in literature is ���from the neighbourhood of Bogot����� and is deposited at United States National Museum at Washington (USNM) (Holthuis, 1952). This species has only been found in freshwater near the coast, but Bogot�� is far away from the coast and at an elevation of 2600 m. Thus, it seems that the Holthuis locality is misreported. The illustrations are taken from Holthuis (1952)., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 33-34, DOI: 10.5281/zenodo.176325, {"references":["Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Rodriguez, G. (1982) Freshwater shrimps (Crustacea, Decapoda, Natantia) of the Orinoco basin and the Venezuelan Guayana. Journal of Crustacean Biology, 2, 378 - 391.","Lopez, B. & Pereira, G. (1996) Inventario de los crustaceos decapodos de las zona alta y media del Delta de Rio Orinoco, Venezuela. Acta Biologica Venezuelica, 16:, 45 - 64.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415."]}

Macrobrachium carcinus (Linn��e, 1758) Fig. 5 A���C Cancer carcinus Linn��e, 1758: 631. Macrobrachium carcinus, Holthuis, 1952: 114.��� Chace & Hobbs, 1969: 93.��� Chace, 1972: 20.- Mart��nez, 1973: 3.��� Escobar, 1979: 107.��� Rodr��guez, 1980: 123.��� Rodr��guez, 1981: 45, 47.��� Williams, 1984: 68.��� Galvis, 1986: 447.��� Abele & Kim, 1989: 6.��� L��pez & Pereira, 1996: 48.��� Nizinski, 2003: 103.��� Melo: 2003: 348. (For detailed synonymy refer to Holthuis, 1952). Material examined Atl��ntico: Pioj��, Ci��naga El Totumo, 10 Apr 1970, leg. L. E. Mart��nez, 5 males, 2 females, INCODER, Cartagena.��� Tubar��, El Corral de San Luis, 1 Apr 1980, leg. F. Fl��rez, 1 male, 1 female, ICN-MHN-CR 0 852. Bolivar: Ci��naga de Turbaco, 28 Aug 1980, leg. H. Prahl, 1 ovigerous female, CRBMUV 80030. C��rdoba: Lorica. Sin�� River, 20 m asl, 5, 7 Jun 2004, leg. M. R. Campos, 4 males, 3 females, 1 ovigerous, ICN-MHN-CR 2125, 2129, 2130.��� Sin�� River, La Playa, 20 m asl, 6 Jun 2004, leg. M. R. Campos, 3 males, 6 females, 3 ovigerous, ICN-MHN-CR 2126, 2127. Choc��: Acand��. Monomacho stream, 15 m asl, 22 Aug 1995, leg. S. Usma, 2 males, ICN-MHN-CR 1594.��� Sapzurro 50 m asl, 6 Aug 2004, leg. F. Jim��nez, 1 female, ICN-MHN-CR 2183. La Guajira: Barrancas. Calabazo, near Cerrej��n Mine, 600 m asl, 7 Jan 2004, leg. J. I. Mojica, 1 female, ICN-MHN-CR 2161.��� Oreganal, Rancher��a River, 200 m asl, 22 May 2004, leg. C. Castellanos, 8 males, 2 females, 25 juveniles, ICN-MHN-CR 2167.��� Riohacha. south of Mingueo, 45 m asl, 27 Aug 1972, leg. J. Thomerson, 6 males, 5 females, ICN-MHN-CR 0045.��� Rancher��a River, 40 m asl, 9 Oct 2004, leg. C. Castellanos, 1 ovigerous female, 2 juveniles, ICN-MHN-CR 2210.��� Rancher��a River mouth, 40 m asl, 29 Nov 2003, leg. C. Castellanos, 1 ovigerous female, ICN-MHN-CR 2166.��� Riohacha-Santa Marta, Highway, 50 m asl, 27 Aug 1972, leg. P. Cala, 1 ovigerous female, ICN-MHN-CR 0046.��� Riohacha, km 20 southern, 50 m asl, 27 Aug 1972, leg. P. Cala, 2 males, 3 females, ICN-MHN-CR 2090.��� Guerrero River, 47 m asl, 27 Aug 1972, leg. P. Cala, 10 males, 5 females, ICN-MHN-CR 2091.��� Uribia, Cabo de la Vela, 22 May 1986, leg. E. Burbano, 9 juveniles, ICN-MHN-CR 1699. Magdalena: Without precise locality, 60 m asl, 17 Jul 1982, 3 males, INV 775.��� Ci��naga Grande de Santa Marta, Estaci��n Boquer��n, 21 Mar 1989, leg. R. Reyes, 1 juvenile, ICN-MHN-CR 1174.��� Santa Marta. Buritaca, 20 m asl, 20 Nov 1998, leg. R. Casallas & A. J. Bernal, 1 male, 1 ovigerous female, MLS 19.��� Don Diego River, 1 female, 1 juvenile, INV 976.��� Gaira River, 24 Jun 1971, leg. L. E. Mart��nez, 2 ovigerous females, INCODER, Cartagena.��� Gaira River, Apr 1977, leg. V��squez & Parody, 2 females, ICN- MHN-CR 0492.��� Parque Nacional Natural Tayrona, Los Cedros, 3 - 7 Jul 1983, leg. G. Galvis, 4 males, 3 females, ICN-MHN-CR 0 531, 0 536, 0537.��� Pozo Colorado, km 14. from Santa Marta, 29 Aug 1972, leg. J. Thomerson & P. Cala, 1 male, 3 females, ICN-MHN-CR 2092.��� Pueblito, in stream, 27 Aug 1976, 1 male, 1 female, 1 juvenile, INV 980 Sucre: Colos��, Colos�� creek, 150 m asl, 14 Nov 1985, leg. C. Rom��n, 6 males, 1 female, ICN-MHN-CR 1470.��� Toluviejo. Arroyo Pechil��n, 13 Nov 1985, leg. C. Rom��n, 1 male, ICN-MHN-CR 1732.��� Arroyo Pechil��n, 60 m asl, 17 Jul 1982, leg. A. Rocha, 2 female, 1 ovigerous, ICN-MHN-CR 2093. Diagnosis Rostrum lanceolate, apex curved upward, as long as or shorter than antennular peduncle, upper margin with 11 to 14 teeth regularly spaced, including 4-5 teeth completely post orbital, lower margin 3 to 5 teeth; carapace smooth; abdomen smooth; telson terminal margin ending semicircular with one pair of internal and external reduced spines, not overreaching terminal margin of telson. First pair of pereopods overreaching scaphocerite with 2 / 3 to 3 / 4 of carpus. Second pair of pereopods elongated and prominent, similar in shape and size, overreaching scaphocerite with 1 / 3 of merus; merus 1.13 to 1.20 x longer than carpus, and 0.63 to 0.65 x palm length; carpus 1.74 to 2.20 x as long as wide and 0.53 to 0.57 x palm length; palm prominent, 2.90 to 3.57 x as long as wide, and 2.41 to 2.80 x as long as high; fingers 1.03 to 1.09 x longer than palm, gaping when closed, a prominent tooth on midcutting edge of mobile finger, and another one on proximal cutting edge of fixed finger, usually followed by 3 to 4 denticles on each base of finger. Size. The largest male, TL 193.7 mm, CL 62.7 mm; the largest female TL 155.9 mm, CL 51.4 mm; 8 ovigerous females were examined: TL 33.9 to 148.7 mm, CL 9.7 to 49.0 mm, with small and numerous eggs. Remarks This species is most similar to Macrobrachium americanum Bate, 1868, sometimes it is difficult to differentiate specimens of these two species. For this reason, Holthuis (1952) suggested that these two species should be considered as subspecies. However, in the Colombian material we found that these two species have differences in the length of the fingers of the second pair of pereopods: the fingers in M. carcinus are slightly longer than the palm, whereas they are as long as or slightly shorter than the palm in M. americanum. Some specimens of Macrobrachium carcinus were found at INCODER collection: 2 males, the largest male was TL 176.5 mm, CL 57.1 mm; 5 females, 3 of them ovigerous, the range of the ovigerous females were: TL 108.0 to 123.6 mm, CL 34.0 to 37.7 mm. These specimens were not recorded in this article because they lack location data. They may correspond to specimens reported by Martinez (1973), deposited at INCODER. In the material identified by Galvis (1986) as M. carcinus (ICN-MHN-CR 0535), we identified two specimens of M. heterochirus (Wiegmann, 1836) and one specimen of M. crenulatum Holthuis, 1950, the last one is actually labeled as ICN-MHN-CR 2118., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 13-14, DOI: 10.5281/zenodo.176325, {"references":["Linnee, E. C. (1758) Systema Naturae per regna tria Naturae, secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis, Ed. 10, 1, 1 - 824.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Chace, F. A. & Hobbs, H. H. (1969) The freshwater and terrestrial Decapod Crustaceans of the West Indies with special reference to Dominica United States National Museum Bulletin, 292, 1 - 258.","Chace, F. A. (1972) The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a Summary of the West Indian. Shallow-water species (Crustacea: Decapoda: Natantia). Smithsonian Contributions to Zoology, 98, 1 - 179.","Martinez, L. E. (1973) Distribucion biogeografica de camarones de agua dulce del genero Macrobrachium Bate, 1868 (Crustacea, Palaemonidae) en el norte de Colombia. Divulgacion Pesquera, 4, 1 - 12.","Escobar, J. G. (1979) Carideos (Palaemonidae y Atyidae) en los rios de la region de Santa Marta. Anales del Instituto de investigaciones Marinas de Punta de Betin, 11, 97 - 133.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Williams, A. B. (1984) Shrimps, Lobster and Crabs of the Atlantic Coast of the Eastern. United States, Maine to Florida. Smithsonian Institution Press, 1 - 550.","Galvis, G. (1986) Fauna dulceacuicola del Parque Tayrona. Caldasia, 15, 445 - 450.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Lopez, B. & Pereira, G. (1996) Inventario de los crustaceos decapodos de las zona alta y media del Delta de Rio Orinoco, Venezuela. Acta Biologica Venezuelica, 16:, 45 - 64.","Nizinski, M. S. (2003) Annotated checklist of decapod crustaceans of Atlantic coastal and continental shelf waters of the United Estates. Proceedings of the Biological Society of Washington, 116, 96 - 157.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Bate, C. S. (1868) On a new Genus, with four new Species, of freshwater Prawns. Proceedings of the Zoological Society of London, 1868, 363 - 368.","Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151.","Holthuis, L. B. (1950) Preliminary descriptions of twelve new species of Palemonid prawns from American waters (Crustacea Decapoda). Proceedings Koninklijke Nederlandische Akademie van Wetenschapen, 53, 93 - 99."]}

Macrobrachium ferreirai Kensley & Walker, 1982 Fig. 10 A–C Macrobrachium ferreirai Kensley & Walker, 1982: 4. Macrobrachium ferreirai, Magalhães & Walker, 1988: 288.— Melo, 2003: 352. Material examined. Amazonas: Leticia. Corregimiento La Pedrera, Angostura 120 - 130 m asl, 11 - 12 Nov 1994, leg. M. R. Campos, 31 males, 31 females, 5 ovigerous, ICN-MHN-CR 1406, 1416.— Corregimiento La Pedrera, Yupatí Hill, Comeyafú Community, Guacaperiyá stream, 120 m asl, 7 Nov 1994, leg. M. R. Campos, 11 males, 7 females, 2 ovigerous, ICN-MHN-CR 1394.— Corregimiento La Pedrera, Yupatí Hill, Quebradón del Tío Ramón, 180 m asl, 11 Nov 1994, leg. M. R. Campos, 13 males, 22 females, 5 juveniles, ICN-MHN-CR 1404.— Corregimiento La Pedrera, Chorro de Córdoba, Amerú stream, 120 m asl, 8 Nov 1994, leg. M. R. Campos, 28 males, 32 females, 6 ovigerous, ICN-MHN-CR 1397.— Corregimiento La Pedrera, La Tonina stream, 120 m asl, 6 Nov 1994, leg. M. R. Campos, 4 males, 1 ovigerous female, ICN-MHN-CR 2190.— Corregimiento La Pedrera, Makuna Community, Centro Providencia, 180 m asl, 14 Nov 1994, leg. M. R. Campos, 44 males, 30 females, 4 ovigerous, ICN-MHN-CR 1421, 1424.— Corregimiento La Pedrera, Mirití River, El Puerto, 180 m asl, 16 Nov 1994, leg. M. R. Campos, 10 males, 12 females, 3 ovigerous, ICN-MHN- CR 1434.— Corregimiento La Pedrera, Mirití River, 1 km from Puerto Lago, 150 m asl, 19 Nov 1994, leg. M. R. Campos, 9 males, 13 females, 1 ovigerous, ICN-MHN-CR 1441.— Corregimiento La Pedrera, Mirití River, Puerto Lago, 170 m asl, 17 Nov 1994, leg. M. R. Campos 34 males, 34 females, 12 ovigerous, ICN- MHN-CR 1436.— Corregimiento La Pedrera, Mirití River, Puerto Lago, Yukuna Community, 160 - 170 m asl, 19 Nov 1994, leg. M. R. Campos, 28 males, 28 females, 2 ovigerous, ICN-MHN-CR 1440, 1442.— Corregimiento La Pedrera, Tamaritagua Community, 120 - 150 m asl, 10 - 12 Nov 1994, leg. M. R. Campos, 9 males, 5 females, 2 ovigerous, ICN-MHN-CR 1407, 2191, 2193.— Corregimiento La Pedrera, Tamaritagua Community, El Remanso stream, 120 m asl, 12 Nov 1994, leg. M. R. Campos, 20 males, 33 females, 8 ovigerous, ICN-MHN-CR 1414.— Corregimiento La Pedrera, Tamaritagua Community, La Tonina stream, 120 m asl, 12 Nov 1994, leg. M. R. Campos, 3 males, ICN-MHN-CR 2192. — Mirití-Paraná River, Dec 1980, leg. T. Walshbursen 17 males, 10 females, CRBMUV 80170. Casanare: Without precise locality, 19 Feb 1974, leg. P. Cala, 1 male, ICN-MHN-CR 2189. Vaupés: Taraira, Reserva Natural Caparú, 150 m asl, 23 Nov 1994, leg. M. R. Campos, 19 males, 24 females, 5 ovigerous, ICN-MHN-CR 1445, 1446. Diagnosis Rostrum nearly straight, distal portion slightly curved downward, overreaching with distal portion scaphocerite, upper margin with 9 to 14 teeth regularly spaced, including 2-4 teeth completely post orbital, lower margin 1 to 4 teeth; carapace smooth; abdomen slightly pubescent; telson terminal margin ending with sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 1 / 2 of carpus. Second pair of pereopods elongated, similar in shape and size, covered with spines, which are more conspicuous on ventral surface of palm and fingers, overreaching with 2 / 3 of merus scaphocerite; merus 0.62 to 0.64 x carpus length, 0.44 to 0.47 x palm length; carpus 5.81 to 7.48 x as long as wide, and 0.68 to 0.76 x palm length; palm cylindrical, 9.10 to 10.17 x as long as wide; fingers slightly gaping when closed, 0.40 to 0.43 x palm length, mobile finger on mid-proximal portion of cutting edge with 2 to 4 teeth, which diminishing in size to base of finger, fixed finger with a prominent tooth on proximal portion, followed by 3 denticles to its base. Size. The largest male TL 62.9 mm, CL 19.2 mm; the largest female TL 45.4 mm, CL 12.7 mm; 51 ovigerous females were examined: TL 28.5 to 45.4 mm, CL 7.9 to 12.7 mm, with large and few number of eggs. Remarks These are the first records of Macrobrachium ferreirai for Colombia. This species is most similar to Macrobrachium brasiliense (Heller, 1862). The two can be distinguished by features of the carapace and the second pair of pereopods in adult males. The anterolateral portion of the carapace in M. ferreirai is smooth; whereas it is covered in spinules in M. brasiliense. The second pair of pereopods in M. ferreirai is more slen- der than in M. brasiliense, the palm in M. brasiliense is less or equal to 6.3 times as long as wide; in contrast in M. ferreirai it is more than 9.0 times as long as wide; the fingers in M. brasiliense are 0.45 times or more the palm length, whereas in M. ferreirai they are less than 0.45 times the palm length.

Macrobrachium rathbunae Holthuis, 1950 Fig. 17 A���C Material examined. Cauca: Guapi. Gorgona Island, 20 May 1986, leg. P. Cala, 1 male, ICN-MHN-CR 1809. Choc��: Condoto, Vereda El Aguacate, La Vaca stream, affluent of San Juan River, N 5 �� 5 ��� 28.6 ������, W 76 �� 37 ��� 33.5 ������, 77 m asl, 20 Mar 2006, leg. M. R. Campos, 1 male, ICN-MHN-CR 2254.��� Istmina. San Juan River, 250 m asl, 10 Mar 1994, leg. G. Galvis, 3 males, 1 female, ICN-MHN-CR 1199, 2120.��� Vereda San Antonio, La Isidra stream, affluent of San Juan River, N 5 �� 7 ��� 57.8 ������, W 76 �� 42 ��� 3.8 ������, 56 m asl, 16 Mar 2006, leg. M. R. Campos, 1 male, ICN-MHN-CR 2245.��� Vereda San Antonio, Los Pachos stream, affluent of San Juan River, N 5 �� 8 ��� 16.8 ������, W 76 �� 41 ��� 42.4 ������, 63 m asl, 16 Mar 2006, leg. M. R. Campos, 15 males, 4 ov��gerous females, ICN-MHN-CR 2246, 2258.��� Entre Istmina y Tad��, r��o Profund��, afluente del r��o San Juan, 200 m asl, 5 Mar 1994, leg. G. Galvis, 3 males, 2 females, 1 ov��gerous, ICN-MHN-CR 1474.��� Between Istmina and Tad��, Profund�� River, affluent of San Juan River, 200 m asl, 5 Mar 1994, leg. G. Galvis, 3 males, 2 females, 1 ovigerous, ICN-MHN-CR 1474. Valle del Cauca: Llano Bajo, Arib�� stream, 12 Oct 1982, leg. C. Caicedo, 2 males, 5 females, 2 ovigerous, CRBMUV 82006.��� Buenaventura. Highway, Sabaleta Alto River, Jan 1980, 1 male, CRBMUV 80034.��� Cajambre River, Caimancito, 12 Aug, 1983, leg. C. Caicedo 8 males, 1 female, CRBMUV 83004 A, 83006.��� M��laga Bay, Tres Mar��as, 25 Nov 1985, leg. G. Ramos, 2 females, CRBMUV 85182 A. ��� Calima. Calima River, 15 Aug 1981, leg. R. Neira, 1 male, CRBMUV 81083.��� Creek near Agroforestal Farm, 22 - 23 Oct 1982, leg. C. Caicedo, 12 males, 14 females, 5 ovigerous, CRBMUV 82005, 82011.��� Palma Island, in creek, 20 Jun 2003, leg. N. Bola��os & J. F. Lazarus, 4 males 1 ovigerous female, CRBMUV 0 0 3009. Diagnosis Rostrum nearly straight, with distal portion directed downward, apex directed slightly upward, usually shorter than scaphocerite, upper margin with 9 to 13 teeth, including 1-2 teeth completely post orbital, first proximal tooth separated from the second one by a large recess, lower margin 3 to 6 teeth; carapace usually smooth, some large specimens slightly pubescent on anterolateral region; abdomen usually smooth, some large specimens slightly pubescent on pleurae, telson and uropoden; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 1 / 3 of carpus. Second pair of pereopods elongated, prominent, similar in shape and size, with longitudinal rows of spines, overreaching scaphocerite with 1 / 2 of merus; merus 0.73 to 0.77 x carpus length and 0.83 to 0.91 x palm length; carpus 7.16 to 9.52 x as long as wide, and 1.14 to 1.19 x palm length; palm elongated, cylindrical, 7.76 to 9.33 x as long as wide; fingers thickly pubescent, not gaping when closed, 0.43 to 0.47 x palm length, a tooth on proximal portion in each cutting edge of fingers, followed by denticles to base of finger. Size. The largest male TL 116.4 mm, CL 30.6 mm; the largest female TL 80.1 mm, CL 20.3 mm; 9 ovigerous females were examined: TL 39.5 to 63.9 mm, CL 8.9 to 15.3 mm, with small and numerous eggs. Remarks This species is most similar to Macrobrachium acanthurus (Wiegmann, 1836). The two can be distinguished by differences in the rostrum and the second pair of pereopods. The rostrum in M. rathbunae is usually shorter than the scaphocerite, whereas it overreaches the scaphocerite in M. acanthurus. The palm of the second pair of pereopods in M. rathbunae is 7.76 to 9.33 times longer than wide and the fingers are 0.43 to 0.47 times the palm length, whereas the palm in M. acanthurus is 5.62 to 6.26 times longer than wide and the fingers are 0.75 to 0.87 times the palm length. The specimens reported by Prahl, et al. (1984), as Macrobrachium tenellum (Smith, 1871), CRBMUV, 82006, are determined as M. rathbunae., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 31-32, DOI: 10.5281/zenodo.176325, {"references":["Holthuis, L. B. (1950) Preliminary descriptions of twelve new species of Palemonid prawns from American waters (Crustacea Decapoda). Proceedings Koninklijke Nederlandische Akademie van Wetenschapen, 53, 93 - 99.","Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151.","Prahl, H., Caicedo, C. & Rios, R. (1984) Camarones Palaemonidos (Crustacea, Caridea, Palaemonidae) de agua dulce y salobre del Departamento del Valle del Cauca. Cespedesia, 13, 45 - 58.","Smith, S. I. (1871) List of the Crustacea collected by J. A. McNiel in Central America. Annual Report of the Peabody Academy of Science, 1869, 87 - 98."]}

Macrobrachium cortezi Rodr��guez, 1982 Fig. 6 A���D Macrobrachium cortezi Rodr��guez, 1982: 383. Material examined Amazonas: Leticia, Corregimiento La Pedrera, La Tonina stream, 120 m asl, 6 Nov 1994, leg. M. R. Campos, 1 female, ICN-MHN-CR 2188. Guain��a: In��rida, Aguj��n creek, 70 m asl, 23 - 25 Mar 1998, leg. M. R. Campos, 11 males, 13 females, 7 ovigerous, 24 juveniles, ICN-MHN-CR 1691.��� Pajarito creek, 70 m asl, 21 Mar 1998, leg. M. R. Campos, 11 males, 8 females, 7 ovigerous, ICN-MHN-CR 1688.��� La Ceiba Community, Seje creek, 80 m asl, 18 Mar 1998, leg. M. R. Campos, 1 male, 1 ovigerous female, ICN-MHN-CR 1680.��� Ma��oco creek, 75 m asl, 25 Mar 1998, leg. M. R. Campos, 1 male, 4 females, 1 ovigerous, ICN-MHN-CR 1695.��� Yucuta creek, 70 m asl, 24 Mar 1998, leg. M. R. Campos, 3 males, 7 females, 1 ovigerous, ICN-MHN-CR 1693. Vaup��s: Taraira, Serran��a Taraira, 185 m asl, 22 Nov 1994, leg. M. R. Campos, 16 males, 21 females, 10 ovigerous, ICN-MHN-CR 1444. Diagnosis Rostrum nearly straight, slightly curved downward, overreaching with distal portion scaphocerite, upper margin with 10 to 12 teeth regularly spaced, including 2-4 teeth completely post orbital, lower margin 2 to 3 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 2 / 3 of carpus. Second pair of pereopods elongated, similar in shape, different in size, covered with spines, which are prominent on ventral and internal surfaces; the larger pereopod overreaching scaphocerite with 1 / 3 to 1 / 4 of merus; merus 0.71 to 0.73 x carpus length, 0.56 to 0.66 x palm length; carpus 3.45 to 3.57 x as long as wide and 0.79 to 0.91 x palm length; palm subcylindrical, 3.34 to 3.81 x as long as wide, and 2.95 to 3.28 x as long as high; fingers strongly gaping when closed, 0.72 to 0.77 x palm length, prominent tooth on midcutting edge of mobile finger, followed by 3 small teeth to its base; cutting edge of fixed finger with a prominent tooth just behind of prominent tooth of mobile finger, followed by 3 small teeth to its base. Size. The largest male TL 52.6 mm, CL 14.5 mm; the largest female TL 40.5 mm, CL 11.4 mm; 27 ovigerous females were examined: TL 26.6 to 37.0 mm, CL 6.9 to 10.5 mm, with large and few number of eggs. Remarks These are the first records of Macrobrachium cortezi for Colombia. This species is most similar to M. nattereri (Heller, 1862). The two can be distinguished by differences in the carapace and the size of the adult males. The anterolateral surface of the carapace in M. cortezi is smooth; whereas it is covered by spinules in M. nattereri. The total length of the adult males in M. cortezi is shorter than 52.6 mm, whereas it reaches 70 mm in M. nattereri., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on page 15, DOI: 10.5281/zenodo.176325, {"references":["Rodriguez, G. (1982) Freshwater shrimps (Crustacea, Decapoda, Natantia) of the Orinoco basin and the Venezuelan Guayana. Journal of Crustacean Biology, 2, 378 - 391.","Heller, C. (1862) Beitrage zur naheren Kentniss der Macrouren. Sitzungsberichten der Akademischen Wissenschtlichen Wien, 54, 389 - 426."]}

Macrobrachium transandicum Holthuis, 1950 Fig. 21 A���C Diagnosis Rostrum slightly sinuous, shorter than scaphocerite and antennular peduncle, upper margin with 9 to 11 teeth regularly spaced, including 5 teeth completely post orbital, lower margin 2 to 3 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with total length of carpus. Second pair of pereopods similar in shape, different in size, covered with spines, the larger second pereopod overreaching scaphocerite with large portion of merus; merus 0.87 x carpus length and 0.80 x palm length; carpus 3.70 x as long as wide and 0.93 x palm length; palm 4.1 x as long as wide and 3.0 x longer than high; fingers not gaping when closed, cutting edge of fingers thickly pubescent, 0.67 x palm length, mobile finger with a prominent tooth on proximal portion of cutting edge, followed by 4 denticles distributed beyond midcutting edge, fixed finger with a series of 7 denticles of similar size, since proximal portion beyond midcutting edge. Size. A male TL 62.9 mm, CL 20.9 mm; non-ovigerous females were examined. The females present small and numerous eggs (Holthuis, 1952). Remarks The diagnosis is based on one adult male. The specimen almost agrees with Holthuis���s (1952) description. The differences are in the length of the rostrum and in the number of denticles on the cutting edge of the second pair of pereopods. The rostrum in Hothuis���s description is as long as or longer than scaphocerite, whereas it is shorter in the examined specimen. The cutting edge of fingers of the second pair of pereopods in Hothuis���s description have between 12 and 20 denticles, whereas they only show between 4 and 7 denticles in the examined specimen. Let us point out that Hothuis���s illustration and his description do not match exactly each other, because the rostrum of his ilustration is shorter than scaphocerite, similar to the by us examined specimen. The species Macrobrachium transandicum was recorded from Cisneros, Dagua River, department of Valle del Cauca, and the specimens were deposited at the CRBMUV by Prahl et al. (1984). In a recent examination of Prahl et al. ���s material at the CRBMUV, the specimens could not be found., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 35-37, DOI: 10.5281/zenodo.176325, {"references":["Holthuis, L. B. (1950) Preliminary descriptions of twelve new species of Palemonid prawns from American waters (Crustacea Decapoda). Proceedings Koninklijke Nederlandische Akademie van Wetenschapen, 53, 93 - 99.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Prahl, H., Caicedo, C. & Rios, R. (1984) Camarones Palaemonidos (Crustacea, Caridea, Palaemonidae) de agua dulce y salobre del Departamento del Valle del Cauca. Cespedesia, 13, 45 - 58."]}

Macrobrachium digueti (Bouvier, 1895) Fig. 8 A���C Palaemon digueti Bouvier, 1895: 159. Macrobrachium digueti, Holthuis, 1952: 103.��� Rodr��guez, 1981: 47.��� Prahl et al., 1984: 52.��� Abele & Kim, 1989: 9.��� Wicksten, 1989: 13. Macrobrachium diguetti, M��ndez, 1981: 73. (For detailed synonymy refer to Holthuis, 1952). Diagnosis Rostrum rather shallow, almost reaching end of antennular peduncle, upper margin with 13 to 18 teeth regularly spaced, including 4-7 teeth completely post orbital, lower margin 2 to 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with distal portion of carpus. Second pair of pereopods strongly different in shape and size; the larger second pereopod overreaching scaphocerite with distal portion of merus; merus as long as or slightly shorter than carpus; carpus more than 2 x as long as wide, shorter than palm length; palm strongly compressed, the ventral margin straight or slightly convex, with large, thickly pubescent area on lateral surface, 1.7 x as long as high; fingers strongly gaping when closed, cutting edges thickly pubescent, as long as palm, a prominent tooth on proximal portion of each cutting edge, followed by 1 to 2 small teeth to base of finger, and 9 to 12 placed up to tips. The females present small and numerous eggs. The diagnosis is based on (Holthuis, 1952). Remarks The species Macrobrachium digueti was reported from the Calima River, department of Valle del Cauca, and the specimens were deposited at the CRBMUV by Prahl et al. (1984). In a recent examination of Prahl et al ���s material at the CRBMUV the specimens could not be found. Unfortunately, there are no additional specimens in other collections. The illustrations are taken from Holthuis (1952)., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 18-19, DOI: 10.5281/zenodo.176325, {"references":["Bouvier, E. L. (1895) Sur les Palemons recueillis dans le eaux douces de la Basse-Californie par M. Diguet. Bulletin du Museum d'Histoire Naturelle, 1, 159 - 162.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Prahl, H., Caicedo, C. & Rios, R. (1984) Camarones Palaemonidos (Crustacea, Caridea, Palaemonidae) de agua dulce y salobre del Departamento del Valle del Cauca. Cespedesia, 13, 45 - 58.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Wicksten, M. K. (1989) A Key to the Palaemonid Shrimp of the Eastern Pacific Region. Bulletin Southern California Academy of Science, 88, 11 - 20.","Mendez, M. (1981) Claves de identificacion y distribucion de los langostinos y camarones (Crustacea: Decapoda) del mar y rios de la costa del Peru. Boletin del Instituto del Mar, Callao, Peru, 5, 1 - 170."]}

Macrobrachium panamense Rathbun, 1912 Fig. 15 A���C Material examined Cauca: Guapi, Temuey, Guapi River, 50 m asl, 24 Oct 2004, leg. D. M. Valencia & M. R. Campos, 3 males, 12 females, 4 ovigerous, ICN-MHN-CR 2187. Choc��: Bajo Baud��, Ensenada Catripe, 22 May 2005, leg. C. Rinc��n, 2 ovigerous females, ICN-MHN- CR 2263.��� Palestina, Calima - San Juan Rivers, 20 m asl, 18 Mar 1990, leg. G. Galvis, 2 females, 25 juveniles, ICN-MHN-CR 1196. Valle del Cauca: Buenaventura. Veneno creek, 13 Nov 1981, 2 males, 5 females, 3 ovigerous, CRBMUV 81085.��� Bah��a M��laga, 10 Mar 1980, 2 males, 2 females, CRBMUV 80003.��� Buenaventura Bay, Piang��ita, 16 Apr 2004, leg. R. Neira 1 male, 6 females, 16 juveniles, CRBMUV 004001.��� Dagua River mouth, 0.60 m deep, 4 Jun 1983, 1 male, 4 females, 1 ovigerous, CRBMUV 83038. Diagnosis Rostrum sinuous, straight on orbit region, distal portion directed upward, overreaching scaphocerite, upper margin with 10 to 12 teeth, including 2 teeth completely post orbital, proximal teeth with less recess between them than distal ones, lower margin 6 to 9 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching external pair, and overreaching or not the midpoint of telson. First pair of pereopods overreaching scaphocerite with chelae. Second pair of pereopods elongated, slender, similar in shape and size, with longitudinal rows of spinules, overreaching scaphocerite with 1 / 2 of carpus; merus 0.61 to 0.74 x carpus length, and 1.09 to 1.36 x palm length; carpus 0.72 to 1.18 x chela length; fingers not gaping when closed, slightly pubescent, 0.85 to 1.08 x palm length, a tooth on proximal portion in each cutting edge of fingers. Size. The largest male TL 86.3 mm, CL 19.8 mm; the largest female TL 88.5 mm, CL 19.3 mm; 10 ovigerous females were examined: TL 57.5 to 97.8 mm, CL 13.8 to 21.3 mm, with small and numerous eggs. Remarks This species is most similar to Macrobrachium amazonicum (Heller, 1862). The two can be distinguished by differences in the rostrum. The rostrum in M. amazonicum is lower and strongly convex on the orbital region; in contrast, it is high and slightly convex on the orbital region in M. panamense., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 28-29, DOI: 10.5281/zenodo.176325, {"references":["Rathbun, M. J. (1912) New Decapod Crustaceans from Panama. Smithsonian Miscellaneous Collections, 59, 1 - 3.","Heller, C. (1862) Beitrage zur naheren Kentniss der Macrouren. Sitzungsberichten der Akademischen Wissenschtlichen Wien, 54, 389 - 426."]}

Macrobrachium crenulatum Holthuis, 1950 Fig. 7 A���D Macrobrachium crenulatum Holthuis, 1950: 95. Macrobrachium crenulatum, Holthuis, 1952: 107.��� Chace & Hobbs, 1969: 99.��� Chace, 1972: 20.��� Mart��nez, 1973: 11.��� Escobar, 1979: 120.��� Rodr��guez, 1980: 123.��� Abele & Kim, 1989: 8. Macrobrachium carcinus, Galvis, 1986: 447. Macrobrachium olfersi, Galvis, 1986: 448. (For detailed synonymy refer to Holthuis, 1952). Material examined Bolivar: Between Matute - Turbaco, 6 May 1972, leg. L. E. Mart��nez, 1 female, INCODER, Cartagena. Choc��: Acand��, Monomacho stream, 15 m asl, 22 Aug 1995, leg. S. Usma, 2 males, ICN-MHN-CR 1595.��� Sapzurro, 50 m asl, 6 Aug 2004, leg. F. Jim��nez, 1 male, ICN-MHN-CR 2184. La Guajira: Riohacha, Negro River, 50 m asl, 27 Aug 1972, leg. P. Cala, 2 males, 1 female, ICN-MHN- CR 0044.��� Km 3 south Riohacha, 50 m asl, 27 Aug 1972, leg. P. Cala, 2 males, ICN-MHN-CR 2117. Magdalena: Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, 5 - 6 Jul 1983, leg. G. Galvis, 2 males, ICN-MHN-CR 0 532, 2118.��� Parque Nacional Natural Tayrona, Piedras River, 1999, 1 male, Universidad de los Andes. Diagnosis Rostrum straight, apex nearly curved downward, shorter than scaphocerite, as long as antennular peduncle, upper margin with 11 to 14 teeth regularly spaced, including 4-5 teeth completely post orbital, lower margin 2 to 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 1 / 2 of carpus. Second pair of pereopods prominent, different in shape and size, covered with conspicuous spines; the larger second pereopod overreaching scaphocerite with ca. 1 / 3 of merus; merus 1.03 to 1.19 x carpus length, 0.86 to 1.0 x palm length; carpus 1.61 to 2.14 x as long as wide, and 0.72 to 0.89 x palm length; palm prominent with rows of spines, and slightly pubescent on external surface, ventral margin with row of spines, which decreasing in size to base of finger, 2.06 to 2.38 x as long as wide, 1.30 to 1.47 x as long as high; fingers strongly gaping when closed, cutting edges thickly pubescent, 0.98 to 1.21 x palm length, a prominent tooth on 1 / 4 of proximal portion of each cutting edge, followed by 2 to 3 small teeth on its base. Size. The largest male TL 81.0 mm, CL 26.5 mm; the largest female TL 48.8 mm, CL 13.8 mm; non ovigerous females were examined. According to Holthuis (1952) the eggs of this species are small and numerous. Remarks This species is most similar to Macrobrachium hancocki Holthuis, 1950. The two can be distinguished by differences in the second pair of pereopods in adult males. The external surface of the palm of the large chela of the second pair of pereopods in M. hancocki has a clearly differentiated pubescent rectangular space, devoid of spinulation, which is not present in M. crenulatum. One male of Macrobrachium carcinus (Linn��e, 1758) (ICN-MHN-CR 0535), and one male of M. olfersii (Wiegmann, 1836) (ICN-MHN-CR 0532) from Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, department of Magdalena, reported by Galvis (1986) are actually M. crenulatum (ICN-MHN-CR 2118, 0532)., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 16-18, DOI: 10.5281/zenodo.176325, {"references":["Holthuis, L. B. (1950) Preliminary descriptions of twelve new species of Palemonid prawns from American waters (Crustacea Decapoda). Proceedings Koninklijke Nederlandische Akademie van Wetenschapen, 53, 93 - 99.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Chace, F. A. & Hobbs, H. H. (1969) The freshwater and terrestrial Decapod Crustaceans of the West Indies with special reference to Dominica United States National Museum Bulletin, 292, 1 - 258.","Chace, F. A. (1972) The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a Summary of the West Indian. Shallow-water species (Crustacea: Decapoda: Natantia). Smithsonian Contributions to Zoology, 98, 1 - 179.","Martinez, L. E. (1973) Distribucion biogeografica de camarones de agua dulce del genero Macrobrachium Bate, 1868 (Crustacea, Palaemonidae) en el norte de Colombia. Divulgacion Pesquera, 4, 1 - 12.","Escobar, J. G. (1979) Carideos (Palaemonidae y Atyidae) en los rios de la region de Santa Marta. Anales del Instituto de investigaciones Marinas de Punta de Betin, 11, 97 - 133.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Galvis, G. (1986) Fauna dulceacuicola del Parque Tayrona. Caldasia, 15, 445 - 450.","Linnee, E. C. (1758) Systema Naturae per regna tria Naturae, secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis, Ed. 10, 1, 1 - 824.","Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151."]}

Macrobrachium hancocki Holthuis, 1950 Fig. 11 A���D Material examined Choc��: Bah��a Solano, 22 May 1995, leg. F. Montoya, 2 males, ICN-MHN-CR 1794. Cauca: Guapi. Gorgona Island. 13 Feb 1983, leg. M. Alberico, 1 female, CRBMUV 83077.��� Gorgona Island, 22 May 1986, leg. P. Cala, 5 males, ICN-MHN-CR 1810.��� Gorgona Island, La Azufrada stream, 27 May 1978, leg. P. Cala, 3 males, 1 female, CRBMUV 78006.��� Gorgona Island, in small creek at loading platform, 20 Jun 1979, 1 male, CRBMUV 79017.��� Gorgona Island, in small creek, 6 Aug 1979, leg. H. Prahl, 1 male, CRBMUV 79033.��� Gorgona Island, in south creek, 29 Mar 1980, 2 males, CRBMUV 80032. Diagnosis Rostrum straight, distal portion slightly curved downward, shorter than scaphocerite, as long as antennular peduncle, upper margin with 13 teeth regularly spaced, including 3-4 teeth completely post orbital, lower margin with 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 1 / 2 of carpus. Second pair of pereopods prominent, different in shape and size, covered with conspicuous spines; the larger second pereopod overreaching scaphocerite with 1 / 3 to 1 / 2 of merus; merus 1.24 to 1.31 x carpus length, and 0.84 to 0.96 x palm length; carpus 1.74 to 1.80 x as long as wide, and 0.64 to 0.77 x palm length; palm prominent, 2.01 to 2.49 x as long as wide, and 1.36 to 1.55 x as long as high, with rows of spines on external surface, between them a rectangular space thickly pubescent, in addition, a row of spines on lower margin which are smaller on base of finger, internal surface thickly pubescent; fingers strongly gaping when closed, cutting edges thickly pubescent, 0.86 to 1.0 x palm length, prominent tooth on each midportion of proximal cutting edge, usually followed by 2 small teeth on its base. Size. The largest male TL 60.2 mm, CL 20.9 mm; the largest female TL 50.9 mm, CL 14.5 mm. Ovigerous females were not examined. According to Holthuis (1952) the females present numerous and small eggs. Remarks This species is most similar to Macrobrachium crenulatum Holthuis, 1950. The two can be distinguished by differences in the second pair of pereopods in adult males. The external surface of the palm of the large chela of the second pair of pereopods in M. hancocki has a clearly differentiated pubescent rectangular space, without spinulation, whereas the palm lacks this rectangular space in M. crenulatum. The species Macrobrachium hancocki has been recorded from Calima River, department of Valle del Cauca, and specimens were deposited at CRBMUV by Prahl et al. (1984). In a recent examination of Prahl et al ���s material at the CRB- MUV the specimens could not be found., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 22-23, DOI: 10.5281/zenodo.176325, {"references":["Holthuis, L. B. (1950) Preliminary descriptions of twelve new species of Palemonid prawns from American waters (Crustacea Decapoda). Proceedings Koninklijke Nederlandische Akademie van Wetenschapen, 53, 93 - 99.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Prahl, H., Caicedo, C. & Rios, R. (1984) Camarones Palaemonidos (Crustacea, Caridea, Palaemonidae) de agua dulce y salobre del Departamento del Valle del Cauca. Cespedesia, 13, 45 - 58."]}

Genus Macrobrachium Bate, 1868 Macrobrachium Bate, 1868: 363 Macrobrachium, Holthuis, 1952: 10.��� Chace & Hobbs, 1969: 89.��� Rodr��guez, 1980: 113.��� Williams, 1984: 66.��� Melo, 2003: 334. (For detailed synonymy refer to Holthuis, 1952, and Holthuis, 1993). Diagnosis. Rostrum well developed, compressed with teeth on upper and lower margins; carapace with antennal and hepatic spines; branchiostegal groove present; telson with two pairs of spines dorsally, and two pair of spines on posterior margin; mandible with three-joint palp; dactylus of the last three pairs of pereopods simple. Type species. Macrobrachium americanum Bate, 1868., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on page 3, DOI: 10.5281/zenodo.176325, {"references":["Bate, C. S. (1868) On a new Genus, with four new Species, of freshwater Prawns. Proceedings of the Zoological Society of London, 1868, 363 - 368.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Chace, F. A. & Hobbs, H. H. (1969) The freshwater and terrestrial Decapod Crustaceans of the West Indies with special reference to Dominica United States National Museum Bulletin, 292, 1 - 258.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Williams, A. B. (1984) Shrimps, Lobster and Crabs of the Atlantic Coast of the Eastern. United States, Maine to Florida. Smithsonian Institution Press, 1 - 550.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Holthuis, L. B. (1993) The recent genera of the caridean and stenopodidean shrimps (Crustacea, Decapoda), with an appendix on the order Amphionidacea. Nationaal Natuurhistorisch Museum: Leiden, The Netherlands. 1 - 328."]}

Key to species of Macrobrachium from Colombia 1. Second pair of pereopods different in shape (Fig. 7 C, D)........................................................................... 2 ��� Second pair of pereopods similar in shape (Fig. 6 C, D).............................................................................. 6 2. Larger second pereopod with carpus shorter than merus (Fig. 7 C)............................................................ 3 ��� Larger second pereopod with carpus as long as or longer than merus (Fig. 9 C)......................................... 4 3. External surface of palm of large chela of second pair of pereopods with rectangular space densely pubes- cent (Fig. 11 C) ........................................................................................................................... M. hancocki ��� External surface of palm of large chela of second pair of pereopods without densely pubescent rectangular space (Fig. 7 C) ....................................................................................................................... M. crenulatum 4. Ventral margin row of palm of larger second pereopod with smaller spines on the base of finger (Fig. 8 C)...................................................................................................................................................................... 5 ��� Ventral margin row of palm of larger second pereopod with smaller spines on midpalm length (Fig. 9 C).. .................................................................................................................................................. M. faustinum 5. Palm of larger second pereopod swollen with ventral margin strongly convex with external and internal surfaces of palm thickly pubescent (Fig. 14 C) ............................................................................ M. olfersii ��� Palm of larger second pereopod compressed with ventral margin straight or nearly convex with external and internal surfaces of palm less pubescent (Fig. 8 C)................................................................ M. digueti 6. Second pair of pereopods with merus longer than palm (Fig. 2 C).............................................................. 7 ��� Second pair of pereopods with merus shorter than palm (Fig. 3 C)........................................................... 10 7. Rostrum as long as or longer than scaphocerite (Fig. 15 A, 2 A)................................................................. 8 ��� Rostrum shorter than scaphocerite (Fig. 16 A) ............................................................................. M. praecox 8. Merus shorter than carpus (Fig. 2 C)........................................................................................................... 9 ��� Merus same length as carpus (Fig. 18 C)........................................................................................ M. reyesi 9. Upper margin of rostrum convex on orbital region (Fig. 2 A) ............................................. M. amazonicum ��� Upper margin of rostrum straight on orbital region (Fig. 15 A) ............................................ M. panamense 10. Second pair of pereopods with carpus shorter than merus (Fig. 3 C)......................................................... 11 ��� Second pair of pereopods with carpus longer than merus (Fig. 1 C).......................................................... 12 11. Fingers of second pair of pereopods longer than palm (Fig. 5 C). .............................................. M. carcinus ��� Fingers of second pair of pereopods as long as or shorter than palm (Fig. 3 C).................. M. americanum 12. Fingers of second pair of pereopods thickly pubescent (Fig. 1 C).............................................................. 13 ��� Fingers of second pair of pereopods slightly pubescent or without pubescence (Fig. 4 C)...................... 15 13. Fingers of second pair of pereopods less than half of palm length (Fig. 17 C)........................ M. rathbunae ��� Fingers of second pair of pereopods more than half of palm length (Fig. 1 C).......................................... 14 14. Carpus of second pair of pereopods less than 10 times as long as wide (Fig. 1 C)................ M. acanthurus ��� Carpus of second pair of pereopods more than 10 times as long as wide (Fig. 20 B)................ M. tenellum 15. Cutting edge of fingers of second pair of pereopods with row of small teeth of similar size from base to midportion or beyond (Fig. 12 C)............................................................................................................... 16 ��� Cutting edge of fingers of second pair of pereopods without row of teeth of similar size (Fig. 4 C)....... 17 16. Palm of second pair of pereopods less than 4.5 times as long as wide (Fig. 21 C)............ M. transandicum ��� Palm of second pair of pereopods more than 4.5 times as long as wide (Fig. 12 C) ............ M. heterochirus 17. Palm of second pair of pereopods more than 9 times as long as wide (Fig. 10 C) ...................... M. ferreirai ��� Palm of second pair of pereopods less than 7 times as long as wide (Fig. 4 C) ���.................................... 18 18. Carapace without spinules on anterolateral surface (Fig. 6 A) ...................................................... M. cortezi ��� Carapace with spinules on anterolateral surface (Fig. 4 A)........................................................................ 19 19. Palm of second pair of pereopods strongly swollen, less than 3 times as long as high and with spines of different size on internal margin (Fig. 13 C, D) ......................................................................... M. nattereri ��� Palm of second pair of pereopods subcylindrical, more than 3 times as long as high and with spines of similar size on internal margin (Fig. 4 C, D) ............................................................................ M brasiliense, Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 3-4, DOI: 10.5281/zenodo.176325

Macrobrachium heterochirus (Wiegmann, 1836) Fig. 12 A���C Palaemon heterochirus Wiegmann, 1836: 149. Macrobrachium heterochirus, Holthuis, 1952: 69.��� Chace & Hobbs, 1969: 106.��� Chace, 1972: 20.��� Escobar, 1979: 110.��� Rodr��guez, 1980: 122.��� Rodr��guez, 1981: 47.��� Abele & Kim, 1989: 10.��� Melo, 2003: 354. Macrobrachium carcinus, Galvis, 1986: 447. (For detailed synonymy refer to Holthuis, 1952). Material examined Caldas: La Dorada. Corregimiento Guarinocito, 300 m asl, 19 Nov 1987, leg. S. Prada, 1 male, ICN- MHN-CR 0819.��� Guarin�� River, 170 m asl, 17 Dec 2002, leg. G. Galvis, 1 female, ICN-MHN-CR 2082.��� Saman��, Corregimiento Norcasia, La Miel River, 560 m asl, 22 May 1992, leg. G. Galvis, 1 male, ICN-MHN- CR 1469. Cundinamarca: Puerto Salgar, Negro River, 150 m asl, 14 Mar 1992, leg. P. Cala, 1 male, ICN-MHN-CR 2204.��� Yac o p ��, Guaguaqu�� River, 360 m asl, 29 Sep 1997, leg. G. Galvis, 1 male, ICN-MHN-CR 1668. Choc��: Acand��, Acand�� River, 1 ovigerous female, 2 juveniles, INV 768. La Guajira: Riohacha, south of Mingueo, 45 m asl, 27 Aug 1972, leg. J. Thomerson, 1 female, ICN- MHN-CR 2119. Magdalena: Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, 6 Jul 1983, leg. G. Galvis, 2 males, ICN-MHN-CR 0 535. Santander: Simacota. Su��rez River, 2 Mar 1973, leg. J. Vega, 1 male, ICN-MHN-CR 0053.��� Santa Rosa stream, affluent of Su��rez River, 22 May 1981, leg. P. Cala, 2 males, ICN-MHN-CR 1742. Diagnosis Rostrum sinuous, apex curved upward, shorter than scaphocerite, as long as or shorter than antennular peduncle, upper margin with 11 to 13 teeth, including 4-5 teeth completely post orbital, the 3 to 4 distal teeth straight and with more recess between them than rest of teeth, lower margin with 2 to 3 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in midspine, flanked by two pairs of spinules, internal pair about same length as midpoint, external pair shorter than midpoint. First pair of pereopods overreaching scaphocerite with total length of carpus. Second pair of pereopods elongated, prominent, similar in shape and size, with conspicuous spines and thickly pubescence on ventral margin from ischium to merus, palm on distal portion, ventral and internal base of fixed finger; overreaching scaphocerite with 1 / 2 of merus, merus 0.81 to 0.85 x carpus length, 0.59 to 0.63 x palm length; carpus 3.13 to 4.23 x as long as wide, 0.72 to 0.75 x palm length; palm prominent, 4.76 to 6.28 x as long as wide, and 4.0 to 5.60 x as long as high; fingers 0.63 to 0.71 x palm length, cutting edges pubescent with series of small, similar size teeth from their base to midportion. Size. The largest male TL 113.4 mm, CL 38.4 mm; the largest female TL 83.9 mm, CL 26.1 mm; 1 ovigerous female was examined: TL 58.4 mm, CL 17.8 mm, with small and large number of eggs. Remarks Two males identified as Macrobrachium carcinus (Linn��e, 1758) from Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, department of Magdalena (ICN-MHN-CR 0535) by Galvis (1986) are actually M. heterochirus., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 24-25, DOI: 10.5281/zenodo.176325, {"references":["Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Chace, F. A. & Hobbs, H. H. (1969) The freshwater and terrestrial Decapod Crustaceans of the West Indies with special reference to Dominica United States National Museum Bulletin, 292, 1 - 258.","Chace, F. A. (1972) The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a Summary of the West Indian. Shallow-water species (Crustacea: Decapoda: Natantia). Smithsonian Contributions to Zoology, 98, 1 - 179.","Escobar, J. G. (1979) Carideos (Palaemonidae y Atyidae) en los rios de la region de Santa Marta. Anales del Instituto de investigaciones Marinas de Punta de Betin, 11, 97 - 133.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Galvis, G. (1986) Fauna dulceacuicola del Parque Tayrona. Caldasia, 15, 445 - 450.","Martinez, L. E. (1973) Distribucion biogeografica de camarones de agua dulce del genero Macrobrachium Bate, 1868 (Crustacea, Palaemonidae) en el norte de Colombia. Divulgacion Pesquera, 4, 1 - 12.","Linnee, E. C. (1758) Systema Naturae per regna tria Naturae, secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis, Ed. 10, 1, 1 - 824."]}

Macrobrachium olfersii (Wiegmann, 1836) Fig. 14 A���D Palaemon olfersii Wiegmann, 1836: 150. Macrobrachium olfersii, Escobar, 1979: 118.��� Williams, 1984: 70.��� Abele & Kim, 1989: 10.��� Nizinski, 2003: 103. Macrobrachium olfersi, Holthuis, 1952: 95.��� Mart��nez, 1973: 7.��� Rodr��guez, 1980: 120.��� Rodr��guez, 1981: 45, 47.��� Melo, 2003: 366. (For detailed synonymy refer to Holthuis, 1952). Material examined. Magdalena: Santa Marta. Buritaca, 20 m asl, 17 Nov 1998, leg. R. Casallas & A. J. Bernal, 9 males, 2 females 1 ovigerous, 1 juvenile, MLS 18.��� SW, Guachaca River, 10 - 30 m asl, Dec 1993, leg. R. Contreras, 1 male, 10 juveniles, CRBMUV 93005. ��� Parque Nacional Natural Tayrona, Gayraca stream, 1 male, INV 771.��� Parque Nacional Natural Tayrona, Nenguange, 2 males, 1 ovigerous female, INV 773, 979.��� Mamatoco stream, 18 Feb 1976, 3 males, 10 females, 5 ovigerous, INV 772.��� Mamatoco stream, 18 Mar 1976, leg. G. Manjarr��z, 5 males, 1 ovigerous female, INV 975. La Guajira: Riohacha. Rancher��a River, 40 m asl, 7 Oct 2004, Leg. C. Castellanos, 5 males, 3 ovigerous females, ICN-MHN-CR 2209. Diagnosis Rostrum nearly straight, distal part slightly recurved downward, shorter than scaphocerite, as long as antennular peduncle; upper margin with 11 to 14 teeth regularly spaced, including 4-5 teeth completely post orbital, lower margin with 2 to 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, inner pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with distal portion of carpus. Second pair of pereopods prominent, different in shape and size, covered with conspicuous spines and long setae, the larger second pereopod overreaching scaphocerite with ca. 1 / 4 of merus; merus 0.94 to 0.95 x carpus length, and 0.72 to 0.95 x palm length; carpus 2.45 to 2.57 x as long as wide, and 0.76 to 1.0 x palm length; palm prominent with ventral margin convex, external and internal surfaces with rows of spines and conspicuous setae, ventral margin with row of spines which are decreasing in size distally, 2.61 to 3.15 x as long as wide; fingers gaping when closed, thickly pubescent in recess, 0.91 to 1.04 x palm length, cutting edge of each finger with a tooth on midproximal portion, followed by denticles to its distal portion. Size. The largest male TL 88.9 mm, CL 29.4 mm; the largest female TL 62.3 mm, CL 17.6 mm; 11 ovigerous females were examined: TL 36.7 to 50.0 mm, CL 9.6 to 14.9 mm, with small and numerous eggs. Remarks This species is closely related to Macrobrachium faustinum (De Saussure, 1857). The two can be distinguished by differences in the second pair of pereopods in adult males. The spines of the ventral margin���s row of the palm in M. faustiunum are larger proximal and distally but smaller on the midportion; to the contrary, they diminish in size distally in M. olfersii. In addition, the spines and pubescence on the external and internal surface of the palm and on the cutting edge of the fingers are more conspicuous in M. olfersii than in M. faustiunum. Some specimens of Macrobrachium olfersii were found at INCODER collection: 4 males, the largest male was LT 72.0 mm, CL 24.4 mm. These specimens were not recorded in this article because they lack location data. They may correspond to specimens reported by Mart��nez (1973) and deposited at INCODER. The male of Macrobrachium olfersii, from Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, department of Magdalena (ICN-MHN-CR 0532), reported by Galvis (1986) are actually M. crenulatum., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 27-28, DOI: 10.5281/zenodo.176325, {"references":["Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151.","Escobar, J. G. (1979) Carideos (Palaemonidae y Atyidae) en los rios de la region de Santa Marta. Anales del Instituto de investigaciones Marinas de Punta de Betin, 11, 97 - 133.","Williams, A. B. (1984) Shrimps, Lobster and Crabs of the Atlantic Coast of the Eastern. United States, Maine to Florida. Smithsonian Institution Press, 1 - 550.","Abele, L. G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1 - 50.","Nizinski, M. S. (2003) Annotated checklist of decapod crustaceans of Atlantic coastal and continental shelf waters of the United Estates. Proceedings of the Biological Society of Washington, 116, 96 - 157.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Martinez, L. E. (1973) Distribucion biogeografica de camarones de agua dulce del genero Macrobrachium Bate, 1868 (Crustacea, Palaemonidae) en el norte de Colombia. Divulgacion Pesquera, 4, 1 - 12.","Rodriguez, G. (1980) Crustaceos decapodos de Venezuela. Instituto Venezolano de Investigaciones Cientificas, Ed. Caracas, 1 - 494.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Saussure, H. de (1857) Diagnoses de quelques crustaces nouveaux de l'Amerique tropicale. Revue et Magazin de Zoologie Pure et Appliquee, series 2, 9, 501 - 505.","Galvis, G. (1986) Fauna dulceacuicola del Parque Tayrona. Caldasia, 15, 445 - 450."]}

Macrobrachium nattereri (Heller, 1862) Fig. 13 A���D Palaemon nattereri Heller, 1862: 414. Macrobrachium nattereri, Holthuis, 1952: 83.��� Rodr��guez, 1981: 45, 47.��� Rodr��guez, 1982: 386.��� Kensley & Walker, 1982: 9.��� Magalh��es & Walker, 1988: 285.��� Magalh��es, 1989: 79.��� Campos, 1997: 232.��� Melo, 2003: 364. (For detailed synonymy refer to Holthuis, 1952). Material examined. Amazonas: Leticia. Corregimiento La Pedrera, Angostura, 130 m asl, 12 Nov 1994, leg. M. R. Campos, 1 male, 1 ovigerous female, ICN-MHN-CR 1417.��� Corregimiento La Pedrera, La Tonina stream, 120 m asl, 6 Nov 1994, leg. M. R. Campos, 1 male, ICN-MHN-CR 1391.��� Corregimiento La Pedrera, Makuna Community, Centro Providencia, in stream, 180 m asl, 14 ��� 15 Nov 1994, leg. M. R. Campos, 15 males, 5 females, 2 ovigerous, ICN-MHN-CR 1423, 1428, 1432.��� Corregimiento La Pedrera, Tamaritagua Community, in stream, 120 - 150 m asl, 10, 12 Nov 1994, leg. M. R. Campos, 4 males, 2 ovigerous females, ICN-MHN-CR 1402, 1419.��� Corregimiento La Pedrera, Tamaritagua Community, La Tonina stream, 120 m asl, 12 Nov 1994, leg. M. R. Campos, 11 males, 2 females, 1 ovigerous, ICN-MHN-CR 1411. Diagnosis. Rostrum nearly straight, distal part slightly curved downward, as long as or slightly shorter than scaphocerite, upper margin with 9 to 13 teeth regularly spaced, including 3���4 teeth completely post orbital, lower margin 3 to 4 teeth; carapace covered with spinules on anterolateral surface, low extreme of abdominal pleurae with some spinules; telson terminal margin ending with sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with total length of carpus. Second pair of pereopods elongated, prominent, similar in shape, different in size, covered with spines, which are prominent on ventral and internal surfaces, the larger second pereopod overreaching scaphocerite with total length of carpus or with distal portion of merus; merus 0.82 to 0.86 x carpus length, 0.55 to 0.63 x palm length; carpus 2.31 to 2.41 x as long as wide, 0.65 to 0.76 x palm length; palm protuberant laterally, 3.28 to 3.80 x as long as wide, 2.37 to 2.66 x longer than high with spines of different size on internal margin; fingers gaping when closed, 0.63 to 0.77 x palm length, a prominent tooth on midcutting edge of mobile finger, followed by 1 to 3 small teeth on its proximal portion; a prominent tooth on midcutting edge of fixed finger, followed by 2 to 3 small teeth on its base. Size. The largest male TL 71.5 mm, CL 21.0 mm; the largest female TL 43.6 mm, CL 12.0 mm; 6 ovigerous females were examined: TL 33.4 to 41.2 mm, CL 9.4 to 11.0 mm, with large and few number of eggs. Remarks This species is most similar to Macrobrachium brasiliense (Heller, 1862). The two can be distinguished by differences in the second pair of pereopods in adult males. The palm in M. brasiliense is subcylindrical, more than 3 times longer than high, and shows spines of similar size on internal margin, whereas it is swollen laterally, less than 3 times longer than high and presents spines of different size on internal margin in M. nattereri; the fingers in M. brasiliense are usually less than 0.6 times the palm length, whereas it is more than 0.6 times in M. nattereri. Macrobrachium nattereri is also similar to M. cortezi Rodr��guez, 1982. The two can be distinguished by differences in the carapace and the size of the adult males. The anterolateral surface of the carapace in M. cortezi is smooth; whereas it is covered by spinules in M. nattereri. The total length of the adult males in M. nattereri reaches 70 mm, whereas it is shorter than 52.6 mm in M. cortezi. Escobar (1979) recorded Macrobrachium nattereri from NE of the Sierra Nevada de Santa Marta, from the Manzanares, Piedras, Mendiguaca and Machaca Rivers. However, this species is known from the Orinoco and Amazon basins, corresponding to continental rivers. A characteristic of M. nattereri is its low fecundity and abbreviate larval development, which corresponds exclusively to continental species (Magalh��es & Walker, 1988, Magalh��es, 1989). Thus, it appears that the Escobar���s localities may have been misreported., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 25-27, DOI: 10.5281/zenodo.176325, {"references":["Heller, C. (1862) Beitrage zur naheren Kentniss der Macrouren. Sitzungsberichten der Akademischen Wissenschtlichen Wien, 54, 389 - 426.","Holthuis, L. B. (1952) A general revision of the Palaeminidae (Crustacea: Decapoda: Natantia) of the Americas. II. the subfamily Palaemoninae. Allan Hancock Foundation Publications, Occasional Papers, 12, 1 - 396.","Rodriguez, G. (1981) Decapoda. In: Hurlbert, S. H., Rodriguez, G. & Santos, N. D. (Eds.) Acuatic Biota of Tropical South America, Part I: Arthropoda. San Diego State University, San Diego, California, 41 - 51.","Rodriguez, G. (1982) Freshwater shrimps (Crustacea, Decapoda, Natantia) of the Orinoco basin and the Venezuelan Guayana. Journal of Crustacean Biology, 2, 378 - 391.","Kensley, B. & Walker, I. (1982) Palaemonid shrimps from the Amazon Basin, Brazil (Crustacea: Decapoda: Palaemonidae). Smithsonian Contribution to Zoology, 362, 1 - 28.","Magalhaes, C. & Walker, I. (1988) Larval development and ecological distribution of central amazonian Palaemonid shrimps (Decapoda, Caridea). Crustaceana, 55, 279 - 292.","Magalhaes, C. (1989) The larval development of the Palaemonid shrimps from the Amazon Region reared in the laboratory VI. Abbreviated larval development of Macrobrachium nattereri (Heller, 1862) (Crustacea: Decapoda). Amazoniana, 10, 379 - 392.","Campos, M. R. (1997) Crustaceos, Decapodos. In: Instituto Geografico Agustin Codazzi (Ed.), Zonificacion Ambiental para el Plan Modelo Colombo-Brasilero (Eje Apaporis-Tabatinga: PAT). Edit. Linotipia Bolivar, 231 - 235.","Melo, G. A. S. (2003) Familias Atydae, Palaemonidae e Sergestidae. In: Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Loyola Edit, Sao Paulo, 289 - 415.","Escobar, J. G. (1979) Carideos (Palaemonidae y Atyidae) en los rios de la region de Santa Marta. Anales del Instituto de investigaciones Marinas de Punta de Betin, 11, 97 - 133."]}

Macrobrachium faustinum (De Saussure, 1857) Fig. 9 A���D Material examined Archipielago de San Andres y Providencia: Providencia Island, Pueblo Viejo stream, 4 Dec 1980, 3 males, 5 females, 2 ovigerous, INV 1232. Magdalena: Santa Marta. Mamatoco stream, 18 Mar 1976, 1 male, 3 females, 1 ovigerous, INV 974.��� Mamatoco stream, 18 Mar 1976, leg. G. Manjarr��z, 2 males, 1 female, INV 4876. Diagnosis Rostrum nearly straight, apex curved downward, shorter than scaphocerite, slightly shorter or as long as antennular peduncle, upper margin with 12 to 14 teeth regularly spaced, including 4-5 teeth completely post orbital, lower margin with 3 to 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with 1 / 3 of carpus. Second pair of pereopods prominent, different in shape and size, covered with conspicuous spines and long setae; the larger second pereopod overreaching scaphocerite with 1 / 3 of merus; merus 0.79 to 0.85 x carpus length, 0.76 to 0.84 x palm length; carpus 3.02 to 3.64 x as long as wide, and 0.97 to 0.98 x palm length; palm prominent with ventral margin convex, external and internal surfaces with conspicuous setae, ventral margin with row of spines, which are larger proximal and distally, smaller on the midportion; palm 3.32 to 3.86 x as long as wide; fingers strongly gaping when closed, thickly pubescent on recess, 0.93 to 1.19 x palm length, 1 or 2 prominent teeth on each proximal portion of cutting edge, followed by distal denticles. Size. The largest male TL 44.7 mm, CL 14.1 mm; the largest female TL 57.2 mm, CL 17.4 mm; 3 ovigerous females were examined: TL 44.4 to 48.8 mm, CL 12.3 to 14.2 mm, with small and numerous eggs. Remarks This species is most similar to Macrobrachium olfersii (Wiegmann, 1836). The two can be distinguished by differences in the second pair of pereopods in adult males. The proximal and distal spines of the ventral margin row of the palm are larger, whereas they are smaller on the midportion in M. faustinum, however, they are of diminishing size distally in M. olfersii; the spines and the pubescence on the external and internal surfaces of the palm, and the pubescence of the cutting edge of the fingers are less conspicuous in M. faustinum than in M. olfersii. The species Macrobrachium faustinum was reported from Arroyo Coquito, Parque Natural, Nacional Tayrona, and C��rdoba River, department of Magdalena, and the specimens were deposited at INCODER by Mart��nez (1973). In a recent examination of Martinez���s material at INCODER, the specimens could not be found., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on page 19, DOI: 10.5281/zenodo.176325, {"references":["Saussure, H. de (1857) Diagnoses de quelques crustaces nouveaux de l'Amerique tropicale. Revue et Magazin de Zoologie Pure et Appliquee, series 2, 9, 501 - 505.","Wiegmann, A. F. (1836) Beschreibung einiger neuen Crustaceen des Berliner Museums aus Mexico und Brasilien. Archiv fur Naturgeschichte, 2, 145 - 151.","Martinez, L. E. (1973) Distribucion biogeografica de camarones de agua dulce del genero Macrobrachium Bate, 1868 (Crustacea, Palaemonidae) en el norte de Colombia. Divulgacion Pesquera, 4, 1 - 12."]}

Macrobrachium reyesi Pereira, 1986 Fig. 18 A���C Macrobrachium reyesi Pereira, 1986: 198. Material examined Casanare: Cusiana River, 19 Oct 1995, leg. U. Buitrago, 1 male, 1 ovigerous female, MLS 12.��� Between Trinidad and Rond��n, Guachir��a River, 20 Feb 1974, leg. P. Cala, 9 males, 13 females, 2 ovigerous, ICN- MHN-CR 1806.��� Yop a l. Aguazula stream, 30 Nov - 4 Dic 1995, leg. U. Buitrago, 3 males, 1 ovigerous female, MLS 13, 15.��� Streams affluent of Meta River, 30 Nov 1995, leg. U. Buitrago, 1 male, 3 females, 1 ovigerous, MLS 14. Cundinamarca: Medina, La Arenosa creek, 300 m asl, 29 Jul 1986, leg. R. Restrepo, 3 females, ICN- MHN-CR 2202. Meta: Mesetas, Negro creek, affluent of Duda River, 500 m asl, 8 Feb 1988, leg. P. Cala, 1 ovigerous female, ICN-MHN-CR 2203. Diagnosis Rostrum straight, as long as or slightly longer than scaphocerite, upper margin with 7 to 11 teeth, including 2-3 teeth completely post orbital, first proximal tooth separated from the second one by large recess, lower margin with 3 to 5 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with fingers or total length of chelae. Second pair of pereopods elongated, smooth, similar in shape and size, overreaching scaphocerite with 1 / 2 of carpus; merus as long as carpus, 1.2 x palm length, and shorter than chelae; palm 2.4 to 2.6 x as long as high; fingers not gaping when closed, 1.1 x palm length. Size. The largest male TL 29.5 mm, CL 8.3 mm; the largest female, TL 38.2 mm, CL 9.6; 6 ovigerous females were examined: TL 29.2 to 38.2 mm, CL 6.8 to 9.6 mm, with large and few number of eggs. Remarks These are the first records of Macrobrachium reyesi for Colombia., Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 32-33, DOI: 10.5281/zenodo.176325, {"references":["Pereira, G. (1986) Freshwater shrimps from Venezuela I: seven new species of Palaemonidae (Crustacea: Decapoda: Palaemonidae). Proceedings of the Biological Society of Washington, 99, 198 - 210."]}