Onychopterellidae
| Onychopterellidae Temporal range: Late Hirnantian–Early Emsian,  | |
|---|---|
| Fossil of Tylopterella. | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Arthropoda | 
| Subphylum: | Chelicerata | 
| Order: | †Eurypterida | 
| Suborder: | †Eurypterina | 
| Superfamily: | †Onychopterelloidea Lamsdell, 2011 | 
| Family: | †Onychopterellidae Lamsdell, 2011 | 
| Type species | |
| †Onychopterella kokomoensis Miller & Gurley, 1896 | |
| Genera | |
| Synonyms | |
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Onychopterellidae are an extinct family of eurypterids. The family is the only family classified as part of the superfamily Onychopterelloidea. Genera included are Alkenopterus, Onychopterella and Tylopterella.