Full reference: J. V. Matthews. 1970. Two new species of Micropeplus from the Pliocene of western Alaska with remarks on the evolution of Micropeplinae (Coleoptera: Staphylinidae). Canadian Journal of Zoology 48:779-788
Sister taxon: Micropeplus hoogendorni
Type specimen: CNC 11078, an elytra. Its type locality is Lava camp mine, which is in a Messinian dry floodplain sandstone/peat in the Imuruk Volcanics Formation of Alaska.
Average measurements (in mm): elytron 0.610 x 0.380