Rhynchonellata - Rhynchonellida - Petasmariidae

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 Leiorhynchoidea according to G. A. Cooper and R. E. Grant 1976

Sister taxa: Leiorhynchoidea amygdaloidea, Leiorhynchoidea cloudi, Leiorhynchoidea laevis, Leiorhynchoidea rotundidorsa, Leiorhynchoidea scelesta, Leiorhynchoidea schucherti, Leiorhynchoidea variabilis

Type specimen: USNM 155054, a shell (Articulated shell)

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 17.5 x 18.8