Coelostomatini

Short, Andrew Edward Z., 2004, A New Genus and Species of Sphaeridiinae from Costa Rica (Coleoptera: Hydrophilidae), The Coleopterists Bulletin 58 (4), pp. 534-537 : 537

Key to Genera of Central American Coelostomatini 1

1 Elytra with 10 distinct rows of serial punctures including sutural stria - - - - - - - - - - - - - 3

1 9 Elytra without serial punctures, with or without sutural stria - - - - - - - - - - - - - - - - - - - - - - - - - - 2

2 Elytra with distinct sutural stria in posterior half - - - - - - - - - - - - - - - - - - - - - - - - - Phaenostoma

2 9 Elytra without distinct sutural stria - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Phaenonotum

3 First segment of hind tarsus shorter than the second. First visible ventrite carinate basally. Dorsum reddish brown - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Badioglobus new genus

3 9 First segment of hind tarsus longer than second. First visible ventrite carinate or not. Dorsum usually black - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

4 First visible ventrite carinate at least on basal half. Mentum of males not covered with short, dense setae - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Dactylosternum

4 9 First visible ventrite not carinate on basal half. Mentum of males covered with short, dense yellow setae - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Cyclotypus