Heterocerus selanderi, (Pacheco)

King, Jonas G. & Lago, Paul K., 2012, The variegated mud-loving beetles (Coleoptera: Heteroceridae) of Mississippi and Alabama, with discussion and keys to the species occurring in the southeastern United States, Insecta Mundi 2012 (275), pp. 1-53 : 10

13(12). Length 2.6 - 2.8 mm; anterior end of phallobase expanded into a rounded lobe; parameres reduced, hornlike and proximate ( Fig. 50 ); elytra orange with very faint, pale zigzag pattern, often not evident unless the elytra are spread and then backlit ( Fig. 28 ). Known from Florida and southern Georgia, with one record from southern Mississippi .................. 10. H. selanderi (Pacheco)

— Length 3.0 - 4.5 mm; phallobase variable ( Fig. 45 - 49 ), but never rounded and lobe-like; parameres spatulate, triangular or difficult to distinguish; color variable. Widely distributed. ............. 14

14(13). Lateral arms of phallobase curving laterally towards their apices ( Fig. 45 - 46 ); elytral surface relatively smooth, orange-brown; with visible striae ................................................................. 15

— Lateral arms of pallobase either obscured by plate-like structure, or curving inwardly; elytra at least moderately punctate, weakly striate, coloration variable ............................................... 16

Figures

Figures 45-53. Male genitalia of southeastern species. The ventral view is shown unless otherwise stated. 45-50) Heterocerus species in the undulatus group. 45) H. undatus. 46) H. collaris. 47) H. texanus; left - ventral view, right - lateral view. 48) H. schwarzi; left - ventral view, right - lateral view. 49) H. tenuis. 50) H. selanderi. 51-53) Augyles and Tropicus species. Figures 52-53 are at roughly 2x relative scale of prior genitalia. 51) Augyles auromicans. 52) Tropicus nigrellus; left - dorsal view, center - ventral view, right - lateral view. 53) Tropicus pusillus; left - dorsal view, right - ventral view.

Figures 26-29. Habiti of small southeastern species. 26) Tropicus pusillus. This level of color variation can be seen in either sex. 27) Head of Tropicus pusillus. 28) Heterocerus selanderi. 29) Tropicus nigrellus, holotype male and allotype female. Scale line = 1mm.