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Abstract
The genus Guyanobius Spangler, Citation1986 is revised and expanded. Two species, Guyanobius queneyi sp. n. (French Guiana, Suriname) and Guyanobius lacuniventris sp. n. (Venezuela), are described as new and the two existing species, Guyanobius adocetus Spangler, Citation1986 and Guyanobius simmonsorum Spangler, Citation1990, are redescribed. Prior records of G. adocetus from Suriname were erroneous and actually refer to G. queneyi sp. n. All known species of Guyanobius were collected in leaf packs in small forest streams. The discovery of the genus in the Venezuelan Andes adds a remarkable 1200 km westward extension to its known range. Diagnostic characters are illustrated and a key to species is presented.
Acknowledgements
We warmly thank our Venezuelan colleagues for their continued assistance with fieldwork: J. Camacho and M. García (both MALUZ), and J. Joly and J. Clavijo (both MIZA). P. Perkins (MCZ) and P. Queney kindly provided specimens they collected in Guyana and French Guyana, respectively. Warren Steiner hosted AEZS at USNM and provided type loans of both G. adocetus and G. simmonsorum. This research was supported by NSF Grant #DEB–0816904 to AEZS.