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)

Figures

FIGURES 5–8. Elytral apices and antennae of Chelobasis species. 5a. Elytral apex of Ch. aemula. 5b. Antennae of Ch. aemula. 6a. Elytral apex of Ch. bicolor. 6b. Antennae of Ch. bicolor. 7. Elytral apex of Ch. laevicollis. 8a. Elytral apex of Ch. perplexa. 8b. Antennae of Ch. perplexa.