Osmia nuda is a valid species

New osmiine bee material from eastern Europe, which contained males of an Allosmia species with a peculiar morphology, and the re-examination of the female lectotype of Osmia nuda Friese, 1899 revealed that the recent synonymization of Osmia nuda with Osmia rufohirta Latreille, 1811 by A. Müller is erroneous (see “New synonymies 6” from 5.1.2011) . O. nuda is a species of its own. It is very similar to dwarfish females of O. rufohirta, but distinctly differs from that species in male sternal characters.

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