Revision of the bee genus Chlerogella (Hymenoptera, Halictidae), Part I: Central American species

Michael Engel
2009 ZooKeys  
Th e Central American species of the rare bee genus Chlerogella Michener (Halictinae: Augochlorini) are revised. Aside from the previously described Chlerogella elongaticeps Michener and C. clidemiae Engel, fi ve new species are added to the fauna and fi gured as C. prolixa sp. n., C. fortunaensis sp. n., C. kellieae sp. n., C. anthonoma sp. n., and C. pinocchio sp. n. Th ese species include the fi rst records from Costa Rica (C. kellieae, C. anthonoma, and C. pinocchio) and the fi rst
more » ... the fi rst description of the male for C. elongaticeps. A dichotomous key to the species is provided. S. Engel / ZooKeys 23: 47-75 (2009) 48 ing until Moure and Hurd (1987) recognized that two earlier species described from Peru by Vachal (1901) and Enderlein (1903) also belonged therein. However, like the type species Chlerogella elongaticeps Michener, both C. buyssoni (Vachal) and C. nasus (Enderlein) were known only from their female holotypes. Th e same was true for the two most recently described species, C. clidemiae Engel (2003a) from Panamá and C. mourella Engel (2003b) from Ecuador, although the former was captured at fl owers of Clidemia crenulata Gleason (Melastomataceae), representing the fi rst such record for the genus. Today the genus remains one of the more rare among the Augochlorini and although there are numerous species (Engel, in prep.), only a few are known from signifi cant series of individuals. A peer-reviewed open-access journal RESEARCH ARTICLE Michael Herein I provide a review of those species in Central America, expanding the formerly documented diversity of two species to seven and expanding the generic range into Costa Rica. Th e extensive South American fauna and a revised concept for the genus will be provided in the second part of this work (Engel, in prep.). Given the rarity with which individuals have been collected and the large regions of suitable habitat between collection localities (Maps 1, 2) further species will undoubtedly be discovered. Most specimens of the genus have been captured in traps and even then only infrequently. It is unclear why individuals should be so seemingly rare and perhaps the eventual elucidation of Chlerogella biology will provides answers to this mystery. In the interim it is hoped that these works will bring the genus to the attention of a wider range of melittologists and to highlight what glimpses into its diversity are presently available. Material and Methods Material for this fi rst portion of the study consisted of 14 specimens (6♀♀, 8♂♂, despite 15 years of looking for Chlerogella in muesums) from the following collections: AEI Morphological terminology for this study follows that of Michener (1944 Michener ( , 2007 and Engel (2000, 2001) except that the elongate "teeth" of the metatibial spurs are here referred to as "branches" as this term more accurately refl ects their shape and the main body of the spur from which the branches arise is termed the "rachis". Th e abbreviations S and T are used in place of metasomal sternum and tergum, respectively. Th e format for the descriptions is generally taken from that used elsewhere in Augochlorini (e.g., Engel 2007). Measurements were prepared using an ocular micrometer on an
doi:10.3897/zookeys.23.248 fatcat:55gjcqznorbktppdchar4mftba