Crossonychus Chaudoir, 1848

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 790

Subgenus Crossonychus Chaudoir, 1848

Crossonychus Chaudoir, 1848: 98. Type species: Dromius viridis Dejean, 1831 by monotypy. Etymology. From the Greek crossos (fringe) and onyx, - ychos (claw) [masculine].

Lobius Motschulsky, 1864: 230. Type species: Dromius viridis Dejean, 1831 designated by Lorenz (1998: 108).

Peronoscelis Chaudoir, 1876d: 56. Type species: Tetragonoderus figuratus Dejean, 1831 designated by Bousquet and Larochelle (1993: 266). Synonymy established by Ball (2000: 190). Etymology. From the Greek perone (pin, something pointed) and scelos (leg) [feminine].

Diversity.

Western Hemisphere, with about 40 species in the Nearctic (five species, one of them adventive) and Neotropical (about 40 species) Regions. One South American species ( Tetragonoderus undatus Dejean) is adventive in Australia (Moore 1976). The species have been arrayed in two species groups by Ball (2000: 190), the figuratus and intersectus groups; only the last one is represented in North America.