Rhynchonellata - Athyridida - Athyrididae

Full reference: G. A. Cooper and R. E. Grant. 1976. Permian Brachiopods from West Texas, IV. Smithsonian Contributions to Paleobiology 21:1923-2607

Belongs to Composita according to G. A. Cooper and R. E. Grant 1976

Sister taxa: Athyris (Composita) indosinensis, Athyris (Composita) semirostrata, Composita advena, Composita affinis, Composita apheles, Composita apsidata, Composita bamberi, Composita biforma, Composita bucculenta, Composita costata, Composita cracens, Composita depressa, Composita discina, Composita elongata, Composita emarginata, Composita enormis, Composita grandis, Composita hapsida, Composita huagongensis, Composita idahoensis, Composita imbricata, Composita jogensis, Composita longa, Composita magnicarina, Composita mexicana, Composita minuscula, Composita mira, Composita misriensis, Composita nucella, Composita ovata, Composita parasulcata, Composita pilula, Composita plana, Composita prospera, Composita pyriformis, Composita quadrirotunda, Composita quantilla, Composita rotunda, Composita sigma, Composita stalagmium, Composita strongyle, Composita subcircularis, Composita subquadrata, Composita subtilita, Composita subtriangularis, Composita tareica, Composita tetralobata, Composita tobaensis

Type specimen: USNM 153009g, a shell (Articulated shell)

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 11.3 x 9.8