Upper Ordovician – Lower Devonian
Caritodens is an extinct genus of stationary epifaunal suspension feeders
Identification in Hand Sample:
- Upright, suborbicular shells
- Distinguished by auricles, well-defined posterior wing
- Comarginal ridges strongly developed
- Lacks radial ornamentation
Fossils of Ohio (1996):
- Ornamentation comarginal only.
- The Upper Ordovician genus Caritodens is represented in Cincinnatian rocks by C. demissa (Conrad), a large species distinguished by auricles (large winglike extensions of the hinge), strongly developed comarginal ridges, and the lack of any radial ornamentation.
Treatise on Invertebrate Paleontology, Part N, Mollusca 6 (1 of 3) (1969):
- (Under Pterinea) Upright, suborbicular shells without radial ornamentation and possessing a well-developed rounded auricle and well-defined posterior wing