Strophomenata - Productida - Aulostegidae

Full reference: G. A. Cooper and R. E. Grant. 1975. Permian Brachiopods of West Texas, III. Smithsonian Contributions to Paleobiology 19:795-1921

Belongs to Xenosteges according to G. A. Cooper and R. E. Grant 1975

Sister taxa: Xenosteges adherens, Xenosteges magnus, Xenosteges minusculus, Xenosteges quadratus, Xenosteges trivialis, Xenosteges umbonatus

Type specimen: USNM 154241a, a shell (Articulated shell)

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 10.4 x 12.5