Key to extant genera of Ommatinae

1. Vestiture consisting of slender, recumbent setae, which are yellowish brown in colour (Figs 2, 14). Maxillary and labial palps, when extended posteriorly, not reaching the eyes (Fig. 15). Anterior third of gulamentum slightly convex without depression to accommodate maxillary and labial palps (Fig. 15)............................................... Omma Newman

- Vestiture including ribbed setae, which may be yellowish-brown or white in colour, sometimes mixed with spine-like processes. Maxillary and labial palps, when extended posteriorly, clearly reaching beyond eyes (Figs 29, 34). Anterior third of gulamentum variably depressed to accommodate maxillary and labial palps (Figs 23, 24)..................... Beutelius gen. nov.