Taxonomy of ' Euconnus complex'. Part XXIV. Intermediate forms between Psomophus, Eupentarius and Euconnus s. str. in the East Palaearctic fauna unify problematic subgenera (Coleoptera, Staphylinidae, Scydmaeninae) Jałoszyński, Paweł Zootaxa 2022 2022-10-06 5194 3 343 391 Jałoszyński 2022 [181,420,1302,1329] Insecta Staphylinidae Euconnus Animalia Coleoptera 6 349 Arthropoda species rectitibia  One new Japanese species described below as  E. rectitibiais externally similar to  E. debilisand allied species, but males do not have any protibial modifications, and its aedeagus is of a clearly different form, in ventral view drop-shaped, with median elongate and darkly sclerotized endophallic structure situated near middle of the bulbous portion of the median lobe. Moreover, the antennae, including also trimerous clubs, are much slenderer than those in the  Euconnus callidusspecies group. Because of close external similarity to species of the  Euconnus callidusgroup, this interesting taxon is treated here.