Onychocrinus is an extinct genus of crinoids. This genus is known in the fossil records of the Carboniferous period of United States and Canada (age range:...

Montage of multiple fossils. Clockwise from top left: Onychocrinus and Palaeosinopa; bottom row: Gryphaea and Harpactocarcinus...

Forbesiocrinus (Carboniferous, Indiana) Taxocrinus (Mississippian, Indiana) Onychocrinus (Carboniferous, United States) Wright, David F.; Ausich, William I.;...

Intermediacrinus modernus Linocrinus Mantikosocrinus castus Onchyocrinus Onychocrinus pulaskiensis Ophiurocrinus hebdenensis Pentremites platybasis P. pulchellus...

†Onychaster †Onychaster flexilis †Onychocrinus †Onychocrinus exculptus †Onychocrinus exsculptus †Onychocrinus pulaskiensis †Onychocrinus ramulosus †Onychopterella...

Cyathocrinus Delocrinus Dichocrinus Hydreionocrinus Linocrinus L. floweri Onychocrinus O. pulaskiensis Pachylocrinus Paianocrinus P. aptus P. durus Paracymbiocrinus...

†Oncoceras multicameratum †Onniella †Onychocrinus †Onychocrinus grandis – type locality for species †Onychocrinus pulaskiensis †Orbiculoidea †Orbiculoidea...

†Neuropteris tenuifolia †Odontopleura – tentative report †Oncoceras †Onychocrinus †Onychopterella †Oonoceras †Ornithoprion – type locality for genus †Orodus...

†Neuropteris tenuifolia – or unidentified comparable form †Oncoceras †Onychocrinus †Ormoceras †Orthoceras †Pattersonia †Pecopteris †Pecopteris plumosa –...

Institute. 10: 57–76. Springer, F. (1906). "Discovery of the disk of Onychocrinus and further remarks on the Crinoidea Flexibilia". Journal of Geology...

†Oligoporus †Oligopygus †Oneirophanites †Ontariocrinus †Onychaster †Onychocrinus †Oocystis †Oolopygus †Opechinus †Ophiacantha †Ophiaulax †Ophiocnida †Ophiocoma...