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Ptygmactrum

Rhynchonellata - Rhynchonellida - Petasmatheridae

Taxonomy
Ptygmactrum was named by Cooper and Grant (1976) [Sepkoski's age data: P Leon P Guad-l Sepkoski's reference number: 7]. Its type is Ptygmactrum extensum.

It was assigned to Petasmatheridae by Williams et al. (2002); and to Rhynchonellida by Sepkoski (2002).

Synonymy list
YearName and author
1976Ptygmactrum Cooper and Grant p. 1939
2002Ptygmactrum Sepkoski, Jr.
2002Ptygmactrum Williams et al. p. 1276

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
RankNameAuthor
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderRhynchonellidaKuhn 1949
superfamilyWellerelloideaLicharew 1956
familyPetasmatheridaeCooper and Grant 1976
genusPtygmactrum

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
No diagnoses are available