Macrotera
''Macrotera'' is a genus of bees native to North America, particularly diverse in the desert regions of the United States and Mexico. According to Wilson and Carril, there are "around 30" species of ''Macrotera''. ''Macrotera'' are small to medium sized (2.0 mm to 16.0 mm) and often black or reddish in coloration. The genus was treated by P.H. Timberlake who, in addition to T.D.A. Cockerell, described most of the known species. ''Macrotera'' used to be considered part of the genus '' Perdita'' but was split apart by C.D. Michener in 2000. Most species are extreme specialists ( oligoleges) with respect to pollen and will only collect pollen from a few closely related species or genera of plants, particularly the plant genus ''Sphaeralcea'' and various Cactaceae. Species These 31 species belong to the genus ''Macrotera'': * '' Macrotera anthracina'' (Timberlake, 1980) * '' Macrotera arcuata'' (Fox, 1893) * '' Macrotera azteca'' (Timberlake, 1954) * '' Macrotera bicolo ...
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