A revision of the Palaearctic Pimeliini (Coleoptera: Tenebrionidae): the genus Sternodes Fischer von Waldheim, 1837

The genus Sternodes Fischer von Waldheim, 1837 currently consists of one species with two subspecies from Karakum, Sundukli deserts and several surrounding areas. Sternodes pallasi Semenov-Tian-Shanskij et Bogatchev, 1940 is resurrected from a junior synonym of Sternodes caspicus (Pallas, 1781). The following new synonymy is established: Sternodes caspicus caspicus (Pallas, 1781) = Sternodes caspicus eous Semenov-Tian-Shanskij et Bogatchev, 1940, syn. n. The lectotype is designated for S. caspicus eous. As a result, two valid species (without subspecies) are known in the genus. They differ in the structure of head, prosternal process and elytra. Both species are sympatric in Repetek (Karakum Desert, eastern Turkmenistan), but S. caspicus has spring-summer activity, while S. pallasi was collected in late autumn.