Atomaria, Stephens, 1829

Majka, Christopher, Johnson, Colin & Langor, David, 2010, Contributions towards an understanding of the Atomariinae (Coleoptera, Cryptophagidae) of Atlantic Canada, ZooKeys 35 (35), pp. 37-63 : 39

Key to Atlantic Provinces species of Atomaria

1. Antennae close basally, separated from each other by a distance not greater than their distance from eyes; antennomere 1 much longer than 2, obconnical; habitus elongate, parallel; width/length ratio <0.35 - Atomaria s. str. Stephens .................................................................................................... 9

– Antennae less close basally, more distant from each other than their distance from eye; antennomere 1 slightly longer than 2; habitus oval, short, compact; width/length ratio> 0.40 - Anchicera Thomson .......................................... 2

2(1). Elytra distinctly bicoloured (Figs 3, 4) ....................................................... 3

– Elytral colouration variable, either unicoloured, or gradually paler apically, but not with a distinct bicoloured pattern.................................................. 4