Classification
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Atrypida
Family: Anazygidae (Davidson, 1883)
Cincinnatian Genera: Catazyga, Zygospira
Geologic Range
Middle Ordovician – ?Silurian
Common Paleoecology
Anazygidae is an extinct family of stationary epifaunal suspension feeders.
Description of the Family
- Ventribiconvex to planoconvex
- Ribbed shells
- Astrophic hinge
- Small area
- Sulcate to rectimarginate commissure
- Spiralia directed medially to dorsomedially
- simple jugum located dorsally to centrally
Published Descriptions
Treatise on Invertebrate Paleontology, Part H, Vol. 3 (2000):
- Small, ventribiconvex to planoconvex, ribbed shells; astrophic hinge; small area; sulcate to rectimarginate commissure; spiralia directed medialy to dorsomedially with few whorls; simple jugum located dorsally to centrally
Catazyga
Zygosprira
