Euconnus rectitibia, Jałoszyński, 2022

Jałoszyński, Paweł, 2022, 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), Zootaxa 5194 (3), pp. 343-391 : 349

2. Euconnus rectitibia , species sola

One new Japanese species described below as E. rectitibia is externally similar to E. debilis and 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 callidus species group. Because of close external similarity to species of the Euconnus callidus group, this interesting taxon is treated here.