Cycloconchidae
Classification
Phylum: Mollusca
Class: Bivalvia
Order: Actinodontida
Family: Cycloconchidae (Ulrich, 1884)
Cincinnatian Genera: Cycloconcha
Geologic Range
Middle Ordovician – Late Ordovician
Common Paleoecology
Cycloconchidae is an extinct family of facultatively mobile infaunal suspension feeders
Description of the Family
- Ovoid shape
- Shell laterally compressed (isomyarian)
- Submedian beak
- Few elongate teeth below beak
Published Descriptions
Treatise on Invertebrate Paleontology, Part N, Mollusca 6(1 of 3) (1969):
- Amphidetic, with median cardinals and laterals in front of and behind beaks; those of RV stronger than those of LV.
- (Superfamily characteristics) (Cycloconchacea) Ovoid, more or less isomyarian shells with submedian (never terminal) beaks; lacking radial ornamentation; dentition consisting of few elongate teeth below beaks increasing in length toward anterior and posterior margins of hinge (M. Cam. – U. Dev.)
Cycloconcha
