Couplet 11

11a:  Body hemispherical; elytra covering all abdominal turga; abdomen with 3 ventrites; antenna with 11 antennomeres, antennomere 9-11 forming narrow club

Microsporidae   p. 401

11b:  Body more elongate-oval and depressed dorsoventrally; elytra short, 3-4 abdominal tergites exposed; abdomen with 6-7 ventrites; antenna with 9 antennomeres, antennomere 9 forming narrow club