Ptychocrinus Wachsmuth and Springer 1885 (Sea lily)

Crinoidea - Diplobathrida - Dimerocrinitidae

Parent taxon: Dimerocrinitidae according to W. I. Ausich and P. Dravage 1988

See also Sepkoski 2002

Sister taxa: Allozygocrinus, Ambicocrinus, Apurocrinus, Becsciecrinus, Cybelecrinus, Dimerocrinites, Duncanicrinus, Eodimerocrinites, Eucrinus, Eudimerocrinus, Euptychocrinus, Gnarycrinus, Griphocrinus, Hiiumaacrinus, Macarocrinus, Nexocrinus, Oepikicrinus, Rosfacrinus, Shidianocrinus

Subtaxa: Ptychocrinus mullochillensis

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Ecology: stationary upper-level epifaunal suspension feeder

Distribution:

• Silurian of Canada (4: Ontario collections), the United Kingdom (2), United States (2: New York)

• Ordovician of United States (12: Illinois, Iowa, Iowa, Illinois, Kentucky, Minnesota, Ohio)

Total: 20 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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