Chelobasis, Gray, 1832

Staines, C. L., 2009, A review of the genus Chelobasis Gray, 1832 (Coleoptera: Chrysomelidae: Cassidinae), Zootaxa 2033 (1), pp. 58-68 : 59

Key to the Chelobasis

1. Apex of elytra rounded or slightly angulate ( Figs. 5a, 6a, 7); elytral punctures not impressed ................................... 2

- Apex of elytra distinctly angulate ( Fig. 8a); elytral punctures slightly impressed; Costa Rica to Ecuador................... ........................................................................................................................................................ Ch. perplexa (Baly)

2(1).Antennomere 2 transverse ( Fig. 5b) ............................................................................................................................. 3

- Antennomere 2 cylindrical ( Fig. 6b); Nicaragua to Bolivia................................................................ Ch. bicolor Gray

3(2).Antennomere 3 less than length of 1 and 2 combined ( Fig. 5b); lateral margin of pronotum angulate in middle; Ecuador.......................................................................................................................................... Ch. aemula (Waterhouse)

- Antennomere 3 subequal in length to 1 and 2 combined; pronotum not angulate in middle; Colombia....................... .......................................................................................................................................... Ch. laevicollis (Waterhouse)