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Psaenythisca, a new genus of bees from South America (Apoidea, Andrenidae, Protandrenini) with a description of the nesting biology and immature stages of one species. (American Museum novitates, no. 3800)

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dc.contributor.author Ramos, Kelli S.
dc.contributor.author Rozen, Jerome G., Jr. (Jerome George), 1928-
dc.date.accessioned 2014-04-22T15:49:08Z
dc.date.available 2014-04-22T15:49:08Z
dc.date.issued 2014-04-21
dc.identifier.uri http://hdl.handle.net/2246/6523
dc.description 32 pages : illustrations, maps ; 26 cm. en_US
dc.description.abstract A new bee genus from Argentina, Psaenythisca, is described and includes three species: P. flavifrons (Vachal, 1909), n. comb. (originally described as Psaenythia), P. wagneri (Vachal, 1909), n. comb. (originally described as Psaenythia), and P. punctata (Urban, 2009), n. comb. (originally described as Anthrenoides). The new genus is proposed based on a comparative study of the Protandrenini lineages. Psaenythisca is closely related to Cephalurgus and Rhophitulus, and can be distinguished mainly by the forewing with three submarginal cells, premarginal area of S2 to S5 of male with dense pubescence, distal margin of S6 of male slightly emarginated, and male genitalia with relatively broad basal sclerite. Among Protandrenini genera with three submarginal cells, it differs from Anthrenoides and Psaenythia by the combination of male genitalia with a basal sclerite, metasomal terga lacking yellow markings, propodeum rounded, middle tibial spur of the female finely serrate, and slender basal area of S8 of male. In addition, a lectotype is designated for Psaenythia (Psaenythia) wagneri Vachal, 1909. The holotype of P. flavifrons and the lectotype of P. wagneri are redescribed, and the female of P. flavifrons and male of P. punctata are described for the first time. An identification key to, and distribution maps of, the species of Psaenythisca are also provided. Nearly a quarter of a century ago, Arturo Roig-Alsina and the second author discovered a communal nest of one of the species, now known as Psaenythisca wagneri (Vachal, 1909). The nest descended approximately 2 m into the ground and is described herein. From this nest, provision masses, eggs, larvae, and pupae were retrieved as well as developmental and behavioral information. The immatures are described and compared with those of related taxa, and the developmental and behavioral information are recorded. Of special interest is the fact that males exhibit a wide range of head sizes and head shapes. All of this gives rise to intriguing new questions for future investigation. en_US
dc.language.iso en_US en_US
dc.publisher American Museum of Natural History. en_US
dc.relation.ispartofseries American Museum novitates, no. 3800. en_US
dc.subject Psaenythisca. en_US
dc.subject Psaenythisca flavifrons. en_US
dc.subject Psaenythisca wagneri. en_US
dc.subject Psaenythisca punctata. en_US
dc.subject Andrenidae. en_US
dc.subject Bees. en_US
dc.subject Nests. en_US
dc.subject Larvae. en_US
dc.subject Argentina. en_US
dc.title Psaenythisca, a new genus of bees from South America (Apoidea, Andrenidae, Protandrenini) with a description of the nesting biology and immature stages of one species. (American Museum novitates, no. 3800) en_US


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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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