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Ptygmactrum Cooper and Grant 1976 (lamp shell)

Rhynchonellata - Rhynchonellida - Petasmatheridae

PaleoDB taxon number: 28841

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

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

Sister taxa: Elassonia, Iotina, Petasmatherus

Subtaxa: Ptygmactrum acutum, Ptygmactrum angulatum, Ptygmactrum depressum, Ptygmactrum extensum, Ptygmactrum mordicum, Ptygmactrum spiculatum

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Type: Ptygmactrum extensum

Ecology: stationary epifaunal suspension feeder