Rhynchonellata - Terebratulida

Full reference: G. A. Cooper and R. E. Grant. 1976. Permian Brachiopods of west Texas, V. Smithsonian Contributions to Paleobiology 24:2609-3159

Parent taxon: Dielasmatoidea according to A. Williams et al. 2006

Sister taxa: Adygellopsis, Angustothyrididae, Antzeilleridae, Athyrorhynchia, Beecheriidae, Dielasmatidae, Gillediidae, Heterelasminidae, Juvavellidae, Paradygella, Proanadyrella, Pseudoharttina, Pseudopygoides, Thyratryaria, Zugmayeriidae

Subtaxa: Fredericksolasma, Levenolasma, Marinurnula, Oligothyrina, Pleurelasma, Pseudodielasma, Pseudolowenstamia

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Type: Pseudodielasma

Ecology: stationary epifaunal suspension feeder