Tanaidaceans (Crustacea: Peracarida) from the SoJaBio joint expedition in slope and deeper waters in the Sea ofJapan

Fifteen species of Tanaidacea, one apseudomorph and fourteen tanaidomorphs, are described from the collections of the SoJaBio Expedition from the slope and deeper waters of the Sea of Japan. Ten species are new to science: one in the genus Pseudosphyrapus, one in Tanaopsis, two in Akanthophoreus, one as a new genus in the family Colletteidae, one as a new genus in the family Anarthruridae, and four species of Pseudotanais. One species of the last family is represented by insufficient material for a full description and designation. Another species, probably in the genus Torquella, is not identified to species level owing to insufficient, poor condition material. Four species in the collection are recorded for only the second time, in two cases allowing valuable redescription of previously inadequately analyzed taxa. The list of Tanaidacea from the Russian coasts of the Sea of Japan, based on published records and the SoJaBio material, includes twenty taxa, although the identities of at least four of them are doubtful.