Crinoid

Euptychocrinus fimbriatus

• Ordovician
• Girardeau Formation
• Cape Girardeau, Missouri, USA

Size: 3.5 cm crown

Formerly Ptychocrinus fimbriatus. Diagnosis indicates "two arms per ray; dorsal cup ornamentation consists of median-ray ridges; stellate ridges lacking on iBrr." (Brower 1973)