A review of Pseudachorutes Tullberg, 1871 (Collembola, Neanuridae) from the East Asia, with description of six new species.

A review of the Pseudachorutes fauna of the East Asia was performed, mainly based on fresh material from forest ecosystems of the Russian Far East and some adjoining regions. Six new species of the genus, namely P. aleksandrae sp. nov., P. armatus sp. nov., P. minimus sp. nov., P. variabilis sp. nov., P. concinnus sp. nov. and P. morulifer sp. nov., are described and extensive remarks on further six congeners, i.e. P. andrei Weiner Najt, P. hitakamiensis Tamura, P. isawaensis Tamura, P. kangchenjungae Yosii, P. longisetis Yosii and P. polychaetosus Gao Palacios-Vargas, previously known from the studied region, are given. Pseudachorutes conicus Lee Kim and P. sibiricus Rusek, are considered as probable junior synonyms of P. longisetis and P. andrei, respectively. Pseudachorutes boerneri Schӧtt is recorded for the first time in the eastern Palaearctic and redescribed based on materials from Yakutia, Khabarovsk Territory and Southern Primor'e. A regional key to the mentioned species and a summarizing table of diagnostic characters of all regional congeners are also provided.