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534 results on '"Roubik, David W."'

4. Egg and mature larva of a species of Plebeia with a preliminary overview of the mature larvae of the Meliponini relative to those of other corbiculate taxa (Apoidea, Apidae) /

Author

Rozen, Jerome G., Jr. (Jerome George), 1928, Smith, Corey Shepard, Roubik, David W. (David Ward), 1951, American Museum of Natural History Library, Rozen, Jerome G., Jr. (Jerome George), 1928, Smith, Corey Shepard, and Roubik, David W. (David Ward), 1951

Subjects
Anatomy, Bees, Ecuador, Eggs, Insects, Larvae, mandible, Orellana, Plebeia, stingless bees
Published
2019

5. Immature stages of selected meliponine bees (Apoidea, Apidae)

Author

Rozen, Jerome G., Jr. (Jerome George), 1928, Quezada Euán, José Javier G., Roubik, David W. (David Ward), 1951, Smith, Corey Shepard, American Museum of Natural History Library, Rozen, Jerome G., Jr. (Jerome George), 1928, Quezada Euán, José Javier G., Roubik, David W. (David Ward), 1951, and Smith, Corey Shepard

Subjects
Bees, Development, Eggs, Insects, Larvae, stingless bees
Published
2019

21. A molecular phylogeny of the stingless bee genus Melipona (Hymenoptera: Apidae)

Author

Ramírez, Santiago R, Nieh, James C, Quental, Tiago B, Roubik, David W, Imperatriz-Fonseca, Vera L, and Pierce, Naomi E

Subjects
Biological Sciences, Ecology, Evolutionary Biology, Genetics, Animals, Bayes Theorem, Bees, DNA, Mitochondrial, Evolution, Molecular, Likelihood Functions, Phylogeny, RNA, Ribosomal, 16S, Sequence Analysis, DNA, Relaxed molecular clock, Penalized likelihood, Eusociality, Stingless bees, Honey bees, Melipona, Apis, Referential communication, Zoology, Evolutionary biology
Abstract

Stingless bees (Meliponini) constitute a diverse group of highly eusocial insects that occur throughout tropical regions around the world. The meliponine genus Melipona is restricted to the New World tropics and has over 50 described species. Melipona, like Apis, possesses the remarkable ability to use representational communication to indicate the location of foraging patches. Although Melipona has been the subject of numerous behavioral, ecological, and genetic studies, the evolutionary history of this genus remains largely unexplored. Here, we implement a multigene phylogenetic approach based on nuclear, mitochondrial, and ribosomal loci, coupled with molecular clock methods, to elucidate the phylogenetic relationships and antiquity of subgenera and species of Melipona. Our phylogenetic analysis resolves the relationship among subgenera and tends to agree with morphology-based classification hypotheses. Our molecular clock analysis indicates that the genus Melipona shared a most recent common ancestor at least approximately 14-17 million years (My) ago. These results provide the groundwork for future comparative analyses aimed at understanding the evolution of complex communication mechanisms in eusocial Apidae.

Published
2010

30. Pollen and spores of Barro Colorado Island

Author

Roubik, David W. (David Ward), 1951, Moreno Patiño, Jorge Enrique, Missouri Botanical Garden, Peter H. Raven Library, Roubik, David W. (David Ward), 1951, and Moreno Patiño, Jorge Enrique

Subjects
Barro Colorado island, Classification, Panama, Plant spores, Plants, Pollen
Published
1991

32. Honeybees in Borneo

Author

Roubik, David W., Caldwell, M.M., editor, Heldmaier, G., editor, Jackson, Robert B., editor, Lange, O.L., editor, Mooney, H.A., editor, Schulze, E.-D., editor, Sommer, U., editor, Roubik, David W., editor, Sakai, Shoko, editor, and Hamid Karim, Abang A., editor

Published
2005
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34. A stingless bee (Melipona panamica) indicates food location without using a scent trail

Author

Nieh, James C and Roubik, David W

Subjects
Agricultural, Veterinary and Food Sciences, Zoology, Ecology, Biological Sciences, Environmental Sciences, Agricultural and Veterinary Sciences, Behavioral Science & Comparative Psychology, Agricultural, veterinary and food sciences, Biological sciences, Environmental sciences
Abstract

The study of location specification in recruitment communication by bees has focused on two dimensions: direction and distance from the nest. Yet the third dimension, height above ground, may be significant in the tall and dense forest habitats of stingless bees. Foragers of the stingless bee Scaptotrigona postica recruit to a specific three-dimensional location by laying a scent trail. Stingless bees in the genus Melipona are thought to have a more sophisticated recruitment system that communicates distance through sounds inside the nest and direction through pointing zig-zag flights outside the nest. However, prior research on Melipona has not examined height communication or even established that foragers can recruit newcomers to a specific location. We used identical paired feeders to investigate recruitment to food in M panamica on Barro Colorado Island, Panama. We trained foragers from an observation hive to one feeder and monitored both feeders for the subsequent arrival of newcomers. We changed the relative positions of the feeders to test for correct direction, distance, and canopy-level communication. A 40-m canopy tower located inside the forest enabled us to examine canopy-level communication. We found that M. panamica foragers can recruit to a specific (1) direction, (2) distance, and (3) canopy level. To test the possibility that foragers accomplish this by means of a scent trail, we placed the colony on one shore of a small cove and trained bees over 116 m of open water to a feeder located on the opposite shore. We also placed a second feeder on this shore, equidistant from the colony but 20 m from the first feeder. Significantly more newcomers consistently arrived at the feeder visited by the foragers. Thus foragers evidently do not need a scent trail to communicate direction. Inside the nest, a forager produces pulsed sounds while visibly vibrating her wings after returning from a good food source. She is attended by other bees who cluster and hold their antennae around her, following her as she rapidly spins clockwise and counterclockwise. Locational information may be encoded in this behavior. However, foragers may also directly lead newcomers to the food source. Further experiments are planned to test for such piloting and other communication mechanisms. © 1995, Springer-Verlag. All rights reserved.

Published
1995

41. Cryptostigma cecropiaphilum Kondo & Roubik 2022, sp. nov

Author

Kondo, Takumasa and Roubik, David W.

Subjects
Hemiptera, Cryptostigma, Insecta, Arthropoda, Coccidae, Cryptostigma cecropiaphilum, Animalia, Biodiversity, Taxonomy
Abstract

Cryptostigma cecropiaphilum Kondo & Roubik, sp. nov. Material examined (Coccidae). Holotype. Adult ♀. Left label: Cryptostigma / cecropiaphilum Kondo & / Roubik, Ecuador, Orellana / Prov., Yasuní Biosphere / Reserve, ca 14km North of / PUCE Scientific Field / Station, March 2018 / Coll. David W. Roubik. Right label: ex inside hollow stem of / Cecropia ficifolia Warb. / ex Snethl (Urticaceae) / inside nest of Plebeia sp. / Acid Fuchsin Stain / Canada Balsam, 1(1) (CTNI: No. 7109) . Paratypes. Same data as holotype, 54(58 specimens: 17 adult ♀♀ + 10 third-instar nymphs + 24 second-instar nymphs + 7 first-instar nymphs) (CTNI: No. 7109); same data as holotype except date is May 2019, coll. D. Roubik and A. Argoti, 14(15 specimens: 12 adult females + 3 third-instar nymphs) (CTNI: No. 7109); Francisco Orellana Province, Yasuni Biosphere Reserve, PUCE Scientific Field Station, 21.xi.2017, coll. David W. Roubik, inside hollow stem of Cecropia ficifolia Warb. Ex Snethl (Urticaceae), tended by Azteca sp. ants, 2(4 first-instar nymphs) (CTNI: No. 7109); Francisco Orellana Province, Yasuni Biosphere Reserve, PUCE Scientific Field Station, 10.xii.2019, coll. David W. Roubik, inside hollow stem of Cecropia sciadophylla Mart. (Urticaceae), 4(6 specimens: 1 adult female + 5 first-instar nymphs) (QCAZ)., Published as part of Kondo, Takumasa & Roubik, David W., 2022, Description of a new ant- and stingless-bee-loving species of Cryptostigma Ferris (Hemiptera: Coccomorpha: Coccidae) from Ecuador living inside internodes of Cecropia (Urticaceae), with an updated key to the adult females and first-instar nymphs of the genus, pp. 543-554 in Zootaxa 5190 (4) on page 546, DOI: 10.11646/zootaxa.5190.4.4, http://zenodo.org/record/7138503

Published
2022
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42. Cryptostigma Ferris 1922

Author

Kondo, Takumasa and Roubik, David W.

Subjects
Hemiptera, Cryptostigma, Insecta, Arthropoda, Coccidae, Animalia, Biodiversity, Taxonomy
Abstract

Key to adult females of species of Cryptostigma Ferris (modified from Kondo 2010) 1 Ventral tubular ducts present............................................................................ 2 - Ventral tubular ducts absent............................................................................. 3 2(1) With multilocular disc-pores just posterior to antennae. Dorsum with 60 or more orbicular pores. Associated with ants......................................................................................... C. saundersi Laing - Without multilocular disc-pores around antennae. Dorsum with fewer than 35 orbicular pores. Associated with stingless bees................................................................................... C. chacoense Kondo 3(1) Margin of dorsal stigmatic sclerotization dentate (similar to the chain of a chainsaw)................ C. serratum Kondo - Margin of dorsal stigmatic sclerotization smooth, not dentate.................................................. 4 4(3) Dorsum with orbicular pores............................................................................ 5 - Dorsum without orbicular pores........................................................................ 11 5(4) Dorsum with 2 orbicular pores. Multilocular disc-pores present on each side of mouthparts....... C. biorbiculus Morrison - Dorsum with 3 or more orbicular pores. Multilocular disc-pores absent from around mouthparts...................... 6 6(5) Dorsum with a small group of many setae present next to each stigmatic sclerotization. Dorsal derm becoming tessellate in mature specimens. Orbicular pores totaling 3‒8.............................................. C. philwardi Kondo - Dorsal setae absent. Dorsal derm not tessellated in mature specimens. Orbicular pores totaling 3 or 5.................. 7 7(6) Dorsum with 5 orbicular pores.......................................................................... 8 - Dorsum with 3 orbicular pores.......................................................................... 9 8(7) Multilocular pores abundant around vulva and median areas of abdominal segments, and often a few on last thoracic segments too; also present in a submarginal band extending from vulvar area alongside anal cleft to posterior spiracular pore band on each side of body. Cribriform platelets present, each square, round or irregularly shaped and each with 2‒10 pores. Dorsum without clusters of small simple pores (apart from those in the platelets). Some antennal fleshy setae with apices not knobbed. Derm around body margin rugose............................................................. C. urichi (Cockerell) - Multilocular pores abundant around vulva and posterior abdominal segments, but not distributed as above. Cribriform platelets absent. Dorsum with clusters of 4‒10 small simple pores. Antennal fleshy setae with apices always knobbed. Derm around body margin smooth................................................................... C. inquilinum (Newstead) 9(7) Body margin heavily papillate. With very few or no multilocular pores near margin of abdominal apex.. C. gullanae Kondo - Body margin not papillate, although may be somewhat rugose. Numerous multilocular pores present around submargin of abdomen.......................................................................................... 10 10(9) Body about 2x longer than wide. Each stigmatic cleft with 1 stigmatic seta. Associated with ants...... C. jonmartini Kondo - Body about as long as wide. Each stigmatic cleft with 3 stigmatic setae. Associated with stingless bees.................................................................................................. C. melissophilum Kondo 11(4) Dorsum without sclerotic pores. Legs greatly reduced, but each with about 4 segments, each segment mostly quadrate........................................................................................ C. mexicanum Kondo - Dorsum with sclerotic pores. Legs greatly reduced, usually each represented by a rudimentary claw or small sclerotized disc with associated pores and setae......................................................................... 12 12(11) Sclerotic pores arranged in square- to rectangular-shaped groups. Dorsal microducts each with outer ductule long and heavily sclerotized, swollen near duct opening.............................................. C. reticulolaminae Morrison - Sclerotic pores not arranged as above. Dorsal microducts each with outer ductule long or short; if long, neither swollen near duct opening nor heavily sclerotized..................................................................... 13 13(12) Stigmatic sclerotization cone-shaped. Each anal plate with 10–16 dorsal setae............... C. guadua Kondo & Gullan - Stigmatic sclerotization not cone-shaped. Each anal plate usually with 5 or fewer dorsal setae....................... 14 14(13) Preopercular pores present............................................................................. 15 - Preopercular pores absent............................................................................. 16 15(14) Preopercular pores tubercle like. Multilocular pores restricted to perivulvar region and abdominal segments. Associated Hymenoptera unknown.............................................................. C. tuberculosum Kondo - Preopercular pores not tubercle like. Multilocular pores present on perivulvar region and mid areas of thoracic and abdominal segments, also with several pores around prothoracic legs. Associated with stingless bees or Azteca sp. ants.............................................................................. C. cecropiaphilum Kondo & Roubik sp. nov. 16(14) Dorsum next to each stigmatic cleft with small subcircular group of large simple pores.... Cryptostigma rhizophilum Kondo - Dorsum next to each stigmatic cleft without small group of large simple pores................................... 17 17(16) Venter with simple pores present on thorax. Habit arboreal...................................... C. longinoi Kondo - Venter without simple pores. Habit hypogeic............................................... C. silveirai (Hempel), Published as part of Kondo, Takumasa & Roubik, David W., 2022, Description of a new ant- and stingless-bee-loving species of Cryptostigma Ferris (Hemiptera: Coccomorpha: Coccidae) from Ecuador living inside internodes of Cecropia (Urticaceae), with an updated key to the adult females and first-instar nymphs of the genus, pp. 543-554 in Zootaxa 5190 (4) on pages 551-552, DOI: 10.11646/zootaxa.5190.4.4, http://zenodo.org/record/7138503, {"references":["Kondo, T. (2010) Taxonomic revision of the myrmecophilous, meliponiphilous and rhizophilous soft scale genus Cryptostigma Ferris (Hemiptera: Coccoidea: Coccidae). Zootaxa, 2709 (1), 1 - 72. https: // doi. org / 10.11646 / zootaxa. 2709.1.1"]}

Published
2022
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43. A Novel Integrative Methodology for Research on Pot-honey Variations During Post-harvest

Author

Vit, Patricia, primary, Chuttong, Bajaree, additional, Zawawi, Norhasnida, additional, Diaz, Maria, additional, Van der Meulen, Jane, additional, Ahmad, Hajar F., additional, Tomas-Barberan, Francisco A., additional, Meccia, Gina, additional, Danmek, Khanchai, additional, Moreno, Jorge Enrique, additional, Roubik, David W., additional, Barth, Ortrud Monika, additional, Lachenmeier, Dirk W., additional, and Engel, Michael S., additional

Published
2022
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49. Detecting Insect Pollinator Declines on Regional and Global Scales

Author

LEBUHN, GRETCHEN, DROEGE, SAM, CONNOR, EDWARD F., GEMMILL-HERREN, BARBARA, POTTS, SIMON G., MINCKLEY, ROBERT L., GRISWOLD, TERRY, JEAN, ROBERT, KULA, EMANUEL, ROUBIK, DAVID W., CANE, JIM, WRIGHT, KAREN W., FRANKIE, GORDON, and PARKER, FRANK

Published
2013

50. Arthropod Diversity in a Tropical Forest

Author

Basset, Yves, Cizek, Lukas, Cuénoud, Philippe, Didham, Raphael K., Guilhaumon, François, Missa, Olivier, Novotny, Vojtech, Ødegaard, Frode, Roslin, Tomas, Schmidl, Jürgen, Tishechkin, Alexey K., Winchester, Neville N., Roubik, David W., Aberlenc, Henri-Pierre, Bail, Johannes, Barrios, Héctor, Bridle, Jon R., Castaño-Meneses, Gabriela, Corbara, Bruno, Curletti, Gianfranco, da Rocha, Wesley Duarte, De Bakker, Domir, Delabie, Jacques H. C., Dejean, Alain, Fagan, Laura L., Floren, Andreas, Kitching, Roger L., Medianero, Enrique, Miller, Scott E., de Oliveira, Evandro Gama, Orivel, Jérôme, Pollet, Marc, Rapp, Mathieu, Ribeiro, Sérvio P., Roisin, Yves, Schmidt, Jesper B., Sørensen, Line, and Leponce, Maurice

Published
2012
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