Rhynchonellata - Rhynchonellida - Petasmariidae

Full reference: P. E. Cloud. 1944. Part III: Permian brachiopods, in Geology and paleontology of the Permian area northwest of Las Delicias, southwestern Coahuila, Mexico. Geological Society of America Special Paper 52:49-69

Parent taxon: Petasmariidae according to A. Williams et al. 2002

Sister taxa: Athabaschia, Bryorhynchus, Eurycolporhynchus, Megalopterorhynchus, Ovlatchania, Parvaltissimarostrum, Petasmaria, Porostictia, Pugnoides, Rhynoleichus, Shumardella

Subtaxa: Leiorhynchoidea amygdaloidea, Leiorhynchoidea cloudi, Leiorhynchoidea laevis, Leiorhynchoidea rotundidorsa, Leiorhynchoidea scelesta, Leiorhynchoidea schucherti, Leiorhynchoidea sulcata, Leiorhynchoidea variabilis

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Type: Leiorhynchoidea schucherti

Ecology: stationary epifaunal suspension feeder