Scydmaenus (Choleropsis), 1975

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), Zootaxa 5371 (1), pp. 1-75 : 11

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

Figures

FIGURES 51–57. Antennae of Choleropsis in dorsal view, males (51, 53–57) and female (52). Scydmaenus beechmonti Franz (51–52); S. geniculatus (King) (53); S. kurandae Franz (54); S. princeps (King) (55); S. curviclavatus sp. n. (56); S. kroombitanus sp. n. (57).