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.;...

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

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

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...

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

†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...