| Acmoniodus Temporal range: | |
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| Acmoniodus clarkei type specimen (Bottom) | |
| Scientific classification | |
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| Phylum: | |
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| Family: | Incertae sedis |
| Genus: | †Acmoniodus Hussakof & Bryant, 1918 |
Acmoniodus is a poorly known extinct genus of Holocephalian fish from the Devonian period. It is known only by a singular species described from the lower Frasnian-aged Geneseo Shale of New York (state): A. clarkei. [1] [2]