Megastilicus Casey, 1889

Żyła, Dagmara & Koszela, Katarzyna, 2021, Redescription of the genus Megastilicus Casey (Staphylinidae, Paederinae) with the description of a new species, European Journal of Taxonomy 778, pp. 138-147 : 145

Key to the species of Megastilicus Casey, 1889

1. Head longer than wide; antennomere 4 elongate; teeth on labrum blunt; eyes about ⅙ of head length, ¼ to ⅕ of temple length; median emargination of posterior margin of sternum VIII of ca ⅕ of sternum length, ventral process of aedeagus narrower in middle (parameral view); lateral plates of internal sac indistinctive ..................................................................................... M. formicarius Casey, 1889

– Head as long as wide; antennomere 4 transverse; teeth on labrum pointed; eyes about ⅕ of head length, ⅓ of temple length; median emargination of posterior margin of sternum VIII of ca ⅐ of sternum length; ventral process of aedeagus widened in middle (parameral view); lateral plates of internal sac distinctive .......................................................................................................... M. iowaensis sp. nov.