Euconnus kirin, 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 : 352

3. Euconnus kirin species group

This group of three Japanese species is characterized by compact antennae with antennomeres 3‒10 distinctly transverse and with compact trimerous antennal clubs; aedeagi with rapidly narrowed apical regions and paired submedian endophallic sclerites, symmetrical in two species and asymmetrical in one; parameres with numerous apical setae. In two species males have conspicuous cephalic modifications (a transverse frontal groove and lateral impressions), in one species, the modification is barely marked, but can also be seen as a faint transverse frontal impression. All species share also distinctly elongate heads with the vertex bulging posterodorsad, in contrast to species that belong in the E. callidus group which have rounded heads with non-bulging vertexes.