Ischyrosonychini, Chapuis, 1875

Sekerka, Lukáš, 2016, Taxonomic and nomenclatural changes in Cassidinae (Coleoptera: Chrysomelidae), Acta Entomologica Musei Nationalis Pragae 56 (1), pp. 275-344 : 308-309

Key to genera of Ischyrosonychini

1 Basal corners of pronotum acute and more or less projecting backwards. ..................... 2

– Basal corners of pronotum rounded. ............................................................................... 3

2 Body elongate and parallel-sided; explanate margin of elytra narrow and equally wide in whole length. .............................................................................. Eurypedus Gistel, 1834

– Body oval with distinctly rounded lateral sides; explanate margin of elytra broad, distinctly widened around midlength. ........................................... Cistudinella Champion, 1894

3 Antennomere III much longer than II. ............................................................................. 4

– Antennomeres II and III subequal in length. ......................... Eurypepla Boheman, 1854

4 Tarsal claws simple. ......................................................................................................... 5

– Tarsal claws with large basal tooth. ............................................... Enagria Spaeth, 1913

5 Antennae bicolourous with yellow basal and distal black antennomeres; species outside Caribbean. ........................................................................................................................ 6

– Antennae uniformly yellow; Cuba and Hispaniola. .................. Asteriza Chevrolat, 1836

6 Antennae slimmer and longer, along head extending beyond basal margin of pronotum to elytral epipleura with at least two apical antennomeres; mostly South American species. ......................................................................................................................................... 7

– Antennae shorter and stouter, along head reaching to elytral epipleura only with apex of antennomere XI; Mesoamerican species, only three species reaching to South America. ................................................................................................ Physonota Boheman, 1854

7 Antennae with three shiny and sparsely pubescent basal antennomeres. Apex of elytra sparsely pubescent. .......................................................................................................... 8

– Antennae with four shiny and sparsely pubescent basal antennomeres. Apex of elytra bare. ................................................................................................. Orexita Spaeth, 1911

8 Body broadly oval; elytra uniformly yellow; Guatemala and Mexico. .............................. ................................................................................................. Platycycla Boheman, 1854

– Body subcordiform; each elytron on underside with broad black stripe enclosing common orbicular yellow spot on the top of elytra; Colombia and Ecuador. ................................... ........................................................................................................... Aidoia Spaeth, 1952