| Onychocrinus Temporal range:
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| Fossil of Onychocrinus species from Carboniferous of United States | |
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| Genus: | †Onychocrinus Lyon and Casseday, 1860 [1]
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Onychocrinus is an extinct genus of crinoids.
- ^ Lyon, S. S. and S. A. Casseday. 1860. A synonymic list of the Echinodermata of the Palaeozoic rocks of North America. Proceedings of the American Academy of Science and Arts 4::282–304.