The Eucerini (often called long-horned bees) are the most diverse tribe in the family Apidae, with over 32 genera worldwide that were previously classified as members of the family Anthophoridae. All species are solitary, though many nest in large aggregations, and large "sleeping" aggregations of males are found occasionally. Most genera are distinctive in the unusually long male antennae from which the tribe derives its name (eucer- means true horned). They are most diverse in the Western Hemisphere. Classification The classification within the tribe is rather chaotic, as many of the genera are small and poorly characterized, with the bulk of species (about 500) in only five genera. This is a group in serious need of a thorough taxonomic overhaul, and the fusion of many genera would likely result (a revision in 2000 eliminated seven genera, another in 2018 eliminated six more). Genera Agapanthinus LaBerge, 1957 Alloscirtetica Holmberg, 1909 Canephorula Jörgensen, 1909 Cemolobus Robertson, 1902 (recently moved into Eucera) Cubitalia Friese, 1911 Eucera Scopoli, 1770 Eucerinoda Michener & Moure, 1957 Florilegus Robertson, 1900 Gaesischia Michener, LaBerge & Moure, 1955 Gaesochira Moure & Michener, 1955 Hamatothrix Urban, 1989 Lophothygater Moure & Michener, 1955 Martinapis Cockerell, 1929 Melissodes Latreille, 1829 Melissoptila Holmberg, 1884 Micronychapis Moure & Michener, 1955 Mirnapis Notolonia Popov, 1962 Pachysvastra Moure & Michener, 1955 Peponapis Robertson, 1902 (recently moved into Eucera) Platysvastra Moure, 1967 Santiago Urban, 1989 Simanthedon Zavortink, 1975 Svastra Holmberg, 1884 Svastrides Michener, LaBerge & Moure, 1955 Svastrina Moure & Michener, 1955 Syntrichalonia LaBerge, 1957 (recently moved into Eucera) Tetralonia Spinola, 1839 (recently moved into Eucera) Tetraloniella Ashmead, 1899 Thygater Holmberg, 1884 Trichocerapis Cockerell, 1904 Ulugombakia Xenoglossa Smith, 1854 (recently moved into Eucera) References C. D. Michener (2000) The Bees of the World, Johns Hopkins University Press. External links Apinae Bee tribes