Family Ismaridae Thomson, 1858

Diagnosis

This family can be distinguished from other families in this superfamily by the following combination of characters: low insertion of antennae; antennal shelf not developed; antenna of female 15-segmented and male 14-segmented; notauli are largely absent, but represented anteriorly by pits; mesoscutum strongly arched in lateral view; base of second tergite with median furrow.