Polychaetaspidae (8-10 species)

• Oenonites

Ramphioprionidae (6-8 species)

• Protarabellites
• Ramphoprion

Polychaeturidae (1 species)

• Pteropelta

Paulinitidae (2-3 species)

• Kettnerites

Hadoprionidae (1 species)

• Hadoprion

Atraktoprionidae (6-8 species)

• Atraktoprion

Kalloprionidae (4-6 species)

• Kalloprion

Incerta familiae (1 or more species)

Mochtyellidae (2-3 species)

• Mochytella

Symmetroprionidae (1 species)

• Symmetroprion?

Tetraprionidae (1 species)

• Tetraprion?

Xanioprionidae (1 species)

• Xanioprion?

family uncertain (1 species)

• Lunoprionella

other taxa

• Arabellites
• Colpogenys
• Cornugenys
• Croneisigenys
• Diopatraites
• Drilonereisites
• Eotrophonia
• Eunicites
• Leodicites
• Leptoprion
• Lobogenys
• Lumbriconereites
• Nereidavus
• Nereigenys
• Oenonites
• Paleoenonites
• Rhamphenys
• Siluropelta
• Staurocephalites

This last list is based partly on Rich Fuchs' scolecodont site, which includes line drawings of many of these genera. Note also that Cincinnatian scolecodonts are currently undergoing much-needed taxonomic revision by Mats Eriksson (Ohio State University), from whose work the list of families and number of reported species is based.