Identification key to males of Scydmaenus (Choleropsis) 1 Antennomere 5 as long as broad (Fig. 57); antennomere 9 with deep step-wise concavities on both outer and mesal margin (Fig. 57)...................................................................... Scydmaenus kroombitanus sp. n. - Antennomere 5 strongly elongate (e.g., Fig. 51); antennomere 9 curved or bent (Figs 51, 56), with shallow lateral impression (Figs 53, 54), or with one deep lateral concavity (Fig. 55)..................................................... 2 2 Antennomere 9 bent at nearly right angle (Fig. 51).................................. Scydmaenus beechmonti Franz - Antennomere 9 slightly curved or with lateral concavity (Figs 53–56)........................................... 3 3 Antennomere 10 strongly elongate and nearly twice as long as antennomere 9, with lateral impression (Fig. 53).................................................................................... Scydmaenus geniculatus (King) - Antennomere 10 at most slightly elongate and only slightly longer than antennomere 9 (Figs 54–56)................... 4 4 Antennomere 9 with conspicuously deep and abrupt lateral concavity as deep as half width of antennomere (Fig. 55)................................................................................... Scydmaenus princeps (King) - Antennomere 9 with shallow lateral impression (Figs 54, 56).................................................. 5 5 Antennomere 10 distinctly elongate, with lateral proximal asetose convexity with subtriangular distal margin (Fig. 56).............................................................................. Scydmaenus curviclavatus sp. n. - Antennomere 10 indistinctly elongate, with transverse lateral impression, lacking asetose proximal convexity with subtriangular distal margin (Fig. 54)...................................................... Scydmaenus kurandae Franz

Published as part of Jałoszyński, Paweł, 2023, Scydmaenus Latreille of Australia: Revision of species in subgenera Choleropsis Franz, Kingius Franz, Mascarensia Franz, Parallomicrus Franz, Scottiscydmaenus Franz, and description of Ascydmaenus subgen. n. (Coleoptera, Staphylinidae, Scydmaeninae), pp. 1-75 in Zootaxa 5371 (1) on page 11, DOI: 10.11646/zootaxa.5371.1.1, http://zenodo.org/record/10144644