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Ptychocrinus
Taxonomy
Ptychocrinus was named by Wachsmuth and Springer (1885) [Sepkoski's age data: O Ashg-m S Ldov-u]. It is not extant.
It was assigned to Dimerocrinitidae by Ausich and Dravage (1988); and to Diplobathrida by Sepkoski (2002).
It was assigned to Dimerocrinitidae by Ausich and Dravage (1988); and to Diplobathrida by Sepkoski (2002).
Species
Synonymy list
Year | Name and author |
---|---|
1885 | Ptychocrinus Wachsmuth and Springer |
1988 | Ptychocrinus Ausich and Dravage |
2002 | Ptychocrinus Sepkoski |
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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.
G. †Ptychocrinus Wachsmuth and Springer 1885
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†Ptychocrinus mullochillensis Fearnhead and Donovan 2006
Diagnosis
No diagnoses are available