Search

Tetraclita reni Chan, Hsu & Tsai nom. nov. Figures 2 A, 2 D, 3 A���C, 4, 5 Tetraclita squamosa rufotincta Utinomi, 1968: 180 (Cape Diego, Madagascar) Tetraclita africana Ren, 1989: 452, 453, fig. 12 (Sainte Luce, Madagascar, type locality) Material examined. Cape Diego, Madagascar (Galathea stn. 223), ZMUC CRU- 9881, Tetraclita squamosa rufotincta (3 specimens), 03-March- 1951, det. Utinomi 1967; Connoniers Point, Mauritius, ZMUC CRU- 9882, Tetraclita squamosa rufotincta (2 specimens), 30 -April- 1929, coll. Th. Mortensen; Ambovombe, Madagascar, MNHN Entr��e no. 7, Tetraclita (1 specimen), 1931, coll. D. de M. R. Decary; Sarodrano, Madagascar, MNHN C.l. 664, Tetraclita porosa rufotincta (2 specimens), 1906, coll. F. Geay; Fort Dauphin, Madagascar, MNHN, Tetraclita porosa (1 specimen), 1901, coll. Ferlus. Description. Parietes pink, surfaces of some older specimens with white patches due to erosion. Posterior side of scutum and tergum varying from pink to white. Terga from majority of samples with wide base, rounded spur (Fig. 2 A); mean basi-scutal angle 140 �� 8.6 o (n = 6, pooled specimens from Cape Diego, Fort Dauphin and Amobvombe; Fig. 2 A); scutal margin long, lateral depressor muscle crests 6���8. Scutum triangular, large teeth on occludent margin (Fig. 2 A), tergal margin long; adductor muscle scar deep; depressor muscles crests well developed with 6���9 crests; adductor ridge short (Fig. 2 A). Rami of cirrus I unequal (Fig. 3 A, 4 A); exopodite (18 segments, Mauritius sample) longer than endopodite (12 segments, Mauritius sample; Fig. 3 A). Cirrus II shortest of cirri, rami approximately equal (exopodite 12 segments, endopodite 11 segments, Mauritius sample, Fig. 3 B). Setae on rami of cirrus I and II serrulate with 3���4 rows of setules (Fig. 4 A, B, D���F); coxa and base of protopod of cirrus I bearing long, thin, serrulate setae with 5 short setules (Fig. 3 A, 4 A, F), those of cirrus II bearing plumose setae with long feathery setules (Fig. 3 B, 4 B, G); cirrus II additionally bearing flattened, blade-shaped, serrulate setae, each with single row of setules (Fig. 4 H). cirrus III with rami long,slender, somewhat antenniform (Fig. 3 C, 4 C); exopodite (15 segments) shorter than endopodite (24 segments; Mauritius sample, Fig. 3 C). Setae on rami of cirrus III similar to those on cirrus II (Fig. 4 C) plus additional dense, serrulate setae (Fig. 4 E), bidentate, serrate setae (Fig. 2 C, 4 L), bladeshaped serrulate setae (Fig. 4 H) and large multicuspidate setae (Fig. 2 D, 4 I); setules and inter-setule space of multicuspidate setae larger than those of bidentate serrate setae (Fig. 2 C, D, 4 I, L). Cirri IV, V and VI similar, all bearing serrulate setae with 1 row of setules (Fig. 4 M, O); simple setae present on segment junctions of cirri IV���VI (Fig. 4 N, O). Labrum notch slightly concave, with 4���5 teeth on each side (Fig. 5 A, B); posterior surface densely clothed in serrulate setae (Fig. 5 C). Mandible with four teeth, lower angle with ~ 10 small setae (Fig. 5 D���F). Maxillule notched, two large setae on upper notch, 16 on lower notch (Fig. 5 I). Mandibulatory palp oval, long serrulate setae distally (Fig. 5 K, L). Maxilla bi-lobed, covered with dense, serrulate setae, notch between the lobes non-setose (Fig. 5 G, H). Diagnosis. Tetraclita reni nom. nov. is characterized by the multicuspidate setae on cirrus III, which are not seen in other species of Tetraclita except T. japonica Pilsbry 1916, a Pacific species (Ren 1989; Chan 2001). Distribution. Northeastern and southern Madagascar and Mauritius. Remarks. Ren (1989) described a new species of Tetraclita from Madagascar with the epithet africana, which was preoccupied by Tetraclita wireni africana (Nilsson-Cantell 1932). Tetraclita wireni was later assigned to Tesseropora (see Newman & Ross 1976). As Tetraclita africana Ren 1989 is a junior homonym of Tetraclita wireni africana Nilsson-Cantell 1932, Tetraclita reni nom. nov. is erected for the species described by Ren (1989). The present study provides new records of T. reni nom. nov. in southern and northeastern Madagascan waters and Mauritius. Etymology. Tetraclita reni nom. nov. is named in honour of Professor Xianqiu Ren, Institute of Oceanology, Chinese Academy of Science, in recognition of his discovery of this new species (= T. africana) and for his contributions in the field of Chinese barnacle taxonomy., Published as part of Chan, Benny Kwok Kan, Hsu, Chih-Hsiung & Tsai, Pei-Chen, 2009, Morphology and distribution of the acorn barnacle Tetraclita reni nom. nov. (Crustacea: Cirripedia) in Madagascar and adjacent waters, pp. 57-68 in Zootaxa 2019 on pages 59-60, DOI: 10.5281/zenodo.186037, {"references":["Utinomi, H. (1968) Pelagic, shelf and shallow-water cirripedia from the Indo-west Pacific. Videnskalelige Meddelelser fra Dansk Naturhistorisk Forening I Kobenhaven, 131, 161 - 186.","Ren, X. (1989) On a collection of Cirripedia Thoracica from Madagascar and adjacent waters. Bulletin of the Museum national d'Histoire naturelle, Paris, 4 e ser section A, 2, 431 - 468.","Pilsbry, H. A. (1916) The sessile barnacles (Cirripedia) contained in the collection of the U. S. National Museum: including a monograph of the American species. Bulletin of the United States National Museum, 93, 241 - 353.","Chan, B. K. K. (2001) Studies on Tetraclita squamosa and Tetraclita japonica (Cirripedia Thoracica) I: Adult morphology. Journal of Crustacean Biology, 21, 616 - 630.","Nilsson-Cantell, C. A. (1932) Neue Balaniden aus Sud- and Ost-Afrika in dem Berliner Museum. Arkiv fur Zoologi, 24 A, 1 - 18.","Newman, W. A. & Ross, A. (1976) Revision of the balanomorph barnacles; including a catalogue of the species. Memoir of the San Diego Society of Natural History, 9, 1 - 108."]}

Tetraclita reni Chan, Hsu & Tsai nom. nov. Figures 2 A, 2 D, 3 A–C, 4, 5 Tetraclita squamosa rufotincta Utinomi, 1968: 180 (Cape Diego, Madagascar) Tetraclita africana Ren, 1989: 452, 453, fig. 12 (Sainte Luce, Madagascar, type locality) Material examined. Cape Diego, Madagascar (Galathea stn. 223), ZMUC CRU- 9881, Tetraclita squamosa rufotincta (3 specimens), 03-March- 1951, det. Utinomi 1967; Connoniers Point, Mauritius, ZMUC CRU- 9882, Tetraclita squamosa rufotincta (2 specimens), 30 -April- 1929, coll. Th. Mortensen; Ambovombe, Madagascar, MNHN Entrée no. 7, Tetraclita (1 specimen), 1931, coll. D. de M. R. Decary; Sarodrano, Madagascar, MNHN C.l. 664, Tetraclita porosa rufotincta (2 specimens), 1906, coll. F. Geay; Fort Dauphin, Madagascar, MNHN, Tetraclita porosa (1 specimen), 1901, coll. Ferlus. Description. Parietes pink, surfaces of some older specimens with white patches due to erosion. Posterior side of scutum and tergum varying from pink to white. Terga from majority of samples with wide base, rounded spur (Fig. 2 A); mean basi-scutal angle 140 ± 8.6 o (n = 6, pooled specimens from Cape Diego, Fort Dauphin and Amobvombe; Fig. 2 A); scutal margin long, lateral depressor muscle crests 6–8. Scutum triangular, large teeth on occludent margin (Fig. 2 A), tergal margin long; adductor muscle scar deep; depressor muscles crests well developed with 6–9 crests; adductor ridge short (Fig. 2 A). Rami of cirrus I unequal (Fig. 3 A, 4 A); exopodite (18 segments, Mauritius sample) longer than endopodite (12 segments, Mauritius sample; Fig. 3 A). Cirrus II shortest of cirri, rami approximately equal (exopodite 12 segments, endopodite 11 segments, Mauritius sample, Fig. 3 B). Setae on rami of cirrus I and II serrulate with 3–4 rows of setules (Fig. 4 A, B, D–F); coxa and base of protopod of cirrus I bearing long, thin, serrulate setae with 5 short setules (Fig. 3 A, 4 A, F), those of cirrus II bearing plumose setae with long feathery setules (Fig. 3 B, 4 B, G); cirrus II additionally bearing flattened, blade-shaped, serrulate setae, each with single row of setules (Fig. 4 H). cirrus III with rami long,slender, somewhat antenniform (Fig. 3 C, 4 C); exopodite (15 segments) shorter than endopodite (24 segments; Mauritius sample, Fig. 3 C). Setae on rami of cirrus III similar to those on cirrus II (Fig. 4 C) plus additional dense, serrulate setae (Fig. 4 E), bidentate, serrate setae (Fig. 2 C, 4 L), bladeshaped serrulate setae (Fig. 4 H) and large multicuspidate setae (Fig. 2 D, 4 I); setules and inter-setule space of multicuspidate setae larger than those of bidentate serrate setae (Fig. 2 C, D, 4 I, L). Cirri IV, V and VI similar, all bearing serrulate setae with 1 row of setules (Fig. 4 M, O); simple setae present on segment junctions of cirri IV–VI (Fig. 4 N, O). Labrum notch slightly concave, with 4–5 teeth on each side (Fig. 5 A, B); posterior surface densely clothed in serrulate setae (Fig. 5 C). Mandible with four teeth, lower angle with ~ 10 small setae (Fig. 5 D–F). Maxillule notched, two large setae on upper notch, 16 on lower notch (Fig. 5 I). Mandibulatory palp oval, long serrulate setae distally (Fig. 5 K, L). Maxilla bi-lobed, covered with dense, serrulate setae, notch between the lobes non-setose (Fig. 5 G, H). Diagnosis. Tetraclita reni nom. nov. is characterized by the multicuspidate setae on cirrus III, which are not seen in other species of Tetraclita except T. japonica Pilsbry 1916, a Pacific species (Ren 1989; Chan 2001). Distribution. Northeastern and southern Madagascar and Mauritius. Remarks. Ren (1989) described a new species of Tetraclita from Madagascar with the epithet africana, which was preoccupied by Tetraclita wireni africana (Nilsson-Cantell 1932). Tetraclita wireni was later assigned to Tesseropora (see Newman & Ross 1976). As Tetraclita africana Ren 1989 is a junior homonym of Tetraclita wireni africana Nilsson-Cantell 1932, Tetraclita reni nom. nov. is erected for the species described by Ren (1989). The present study provides new records of T. reni nom. nov. in southern and northeastern Madagascan waters and Mauritius. Etymology. Tetraclita reni nom. nov. is named in honour of Professor Xianqiu Ren, Institute of Oceanology, Chinese Academy of Science, in recognition of his discovery of this new species (= T. africana) and for his contributions in the field of Chinese barnacle taxonomy.

Tetraclita rufotincta Pilsbry, 1916 Figures 2 B, 2 C, 3 D���F, 6, 7 Tetraclita squamosa rufotincta Pilsbry, 1916: 253 ���254, pl. 58, figs. 5���6 a (Gulf of Aden-type locality). Tetraclita porosa rufotincta��� Nilsson-Cantell, 1928: 35, fig. 16 (Muscat, Gulf of Oman). Tetraclita squamosa rufotincta��� Utinomi, 1969: 92 (Nabiyu Tunb, Strait of Hormuz). Tetraclita rufotincta. - Ross, 1999 (Red Sea). Material examined. South Yemen, MNHN, Paris, Tetraclita rufotincta (3 specimens), det Diana Jones; Islet east of Shimoni, Kenya, NHM, London, Tl 978. 370 - 379, Tetraclita rufotincta (2 specimens), 20 -November- 1971, coll, J.D. Taylor, det A.J. Southward; Aldabra, Indian Ocean, NHM, London, 1978.47, Tetraclita sp. (3 specimens), Dune Jean Louis, 16 -August- 1973, coll. J.D. Taylor; Lontide Muscat (Gulf of Oman), NHM, London, 1902.12.8.3��� 8, Tetraclita porosa var rufotincta (4 specimens); Kosi Bay, Mozambique, NHM, London, 1967. 3. 14.31, Tetraclita rufotincta (1 specimen), coll. 13.7. 49, University of Cape Town, Ecological Survey; Madagascar (Nossy-Kousba), MNHN, Paris, Tetraclita squamosa rufotincta (1 specimen), 1991, coll. Joly; Tanikely, Madagascar, MNHN, Paris, CI 674, CI 675, Tetraclita rufotincta (3 specimens), 1 - April- 1960. Description. Parietes pink, surfaces of some older specimens with white patches due to erosion. Posterior side of scutum and tergum varying from pink to white. Tergum spur sharp (Fig. 2 B); mean basi-scutal angle 110 �� 13 �� (n = 6, pooled specimens from Aldabra, Kenya and South Yemen); lateral depressor muscle crests 7���10. Scutum triangular, large teeth on occludent margin (Fig. 2 B); adductor muscle scar deep; depressor muscle crests 10���11. Cirrus I with rami unequal, exopodite (20 segments, Yemen sample) longer than endopodite (12 segments, Yemen sample; Fig. 3 D); rami (Fig. 6 A) bearing serrulate setae with 3 rows of setules (Fig. 6 D), feathery serrulate setae (Fig. 6 E) and blade-shaped serrulate setae with very short and sparse setules (Fig. 6 J); coxa and base of protopod with feathery serrulate setae (Fig. 6 F). Cirrus II shorter than cirrus I; exopodite (15 segments, Yemen sample) and endopodite (13 segments, Yemen sample) similar length (Fig. 3 E, 6 B). Setal types of cirrus II similar to cirrus I (Fig. 6 A, B), except blade-shaped setae with short, sparse setules absent (Fig. 6 J); coxa with plumose setae (Fig. 6 G). Cirrus III with exopodite (11 segments, Yemen sample) and endopodite (11 segments, Yemen sample) similar length (Fig. 3 F, 6 C); cirrus III exhibiting highest diversity of setal types (Fig. 6 C); setae on base and coxa of protopod plumose (Fig. 6 G) and serrulate (Fig. 6 F); rami with serrulate setae (Fig. 6 D, E, H), bidentata, serrate setae (Fig. 2 C, Fig. 6 I) and thick, bladeshaped, serrulate setae with short setules (Fig. 6 J). Rami of cirri IV, V, VI with serrulate setae, each with 1 row of setules (Fig. 6 K, L); segmental junctions with short, simple setae (Fig. 6 M). Labrum concave, 4���5 large teeth on each side of notch (Fig. 7 A, B); posterior side of labrum with serrulate setae (Fig. 7 C). Mandible with 4 teeth, 2 nd and 3 rd bidentate, 4 th tridentate (Fig. 7 D, E, F); lower angle with 5���6 small setae (Fig. 7 E). Maxillule notched, 2 large setae at upper notch, 8 setae on lower notch (Fig. 7 I, J). Mandibulatory palp oval (Fig. 7 G, H). Maxilla bilobed with long setae, notch between lobes non-setose (Fig. 7 K, L). Maxillule, mandibulatory palp and maxilla with serrulate setae(Fig. 7 J, K, L). Diagnosis. Tetraclita rufotincta can be distinguished from T. reni nom. nov. by the lack of multicuspidate setae on cirrus III, and the tergum with a sharper spur and a smaller basi-scutal angle when compared to T. reni nom. nov. Distribution. West coast of India (Mumbai), Gulf of Aden, Red Sea, East coast of Africa, NW Madagascar. Remarks. Tetraclita rufotincta is a widely distributed species in the West Indian Ocean. Pilsbry (1916) identified this species from Aden (type locality) and concluded specimens from Zanzibar, East Africa, were also T. rufotincta. Pilsbry (1916), however, noted there were intra-specific morphological variations between a Zanzibar specimen and the Aden specimens. The Zanzibar specimen had a tergum with a spur which was 'less deeply entered' (i.e. larger basi-scutal angle) and a straighter scutal margin, and a scutum with deeper articular furrows when compared to the Aden specimens. In the present study, Tetraclita rufotincta specimens from Aldabra appeared to have a larger basi-scutal angle (spur less deeply entered) than those from Kenya and Aden (Fig. 2 B). The setal types of cirri and mouth parts of these populations were similar. As there are no obvious diagnostic morphological variations between these populations, they are considered as T. rufotincta in the present study. However, since there are intra-specific morphological variations among geographical populations, it is likely that T. rufotincta contains a cryptic species complex in the West Indian Ocean. Further studies should be conducted on molecular analysis to compare the genetic differentiation of T. rufotincta in different geographical populations of the West Indian Ocean to further ascertain the taxonomic status of the barnacle from different geographical locations., Published as part of Chan, Benny Kwok Kan, Hsu, Chih-Hsiung & Tsai, Pei-Chen, 2009, Morphology and distribution of the acorn barnacle Tetraclita reni nom. nov. (Crustacea: Cirripedia) in Madagascar and adjacent waters, pp. 57-68 in Zootaxa 2019 on page 64, DOI: 10.5281/zenodo.186037, {"references":["Pilsbry, H. A. (1916) The sessile barnacles (Cirripedia) contained in the collection of the U. S. National Museum: including a monograph of the American species. Bulletin of the United States National Museum, 93, 241 - 353.","Nilsson-Cantell, C. A. (1928) Studies on cirripedes in the British Museum (Nat. Hist.). Annals and Magazine of the Natural History Museum, 2, 1 - 39.","Utinomi, H. (1969) Cirripedia of the Iranian Gulf. Videnskalelige Meddelelser fra Dansk Naturhistorisk Forening I Kobenhaven, 132, 79 - 94.","Ross, A. (1999) Studies on the Tetraclitidae (Cirripedia: Balanomorpha); new species of Tetraclita from the Red Sea. Pakistan Journal of Marine Science, 8, 41 - 53."]}