n = 9
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Scymnodon ichiharai | Yano & Tanaka, 1984 | Scymnodon ichiharai | Somniosidae | Japanese velvet dogfish |
| Scymnodon macracanthus | (Regan, 1906) | Scymnodon macracanthus | Somniosidae | Largespine velvet dogfish |
| Scymnodon melas | Bigelow, Schroeder & Springer, 1953 | Centroscymnus coelolepis | Somniosidae | Portuguese dogfish |
| Scymnodon niger | Chu & Meng, 1982 | Zameus squamulosus | Somniosidae | Velvet dogfish |
| Scymnodon obscurus | (Vaillant, 1888) | Zameus squamulosus | Somniosidae | Velvet dogfish |
| Scymnodon plunketi | (Waite, 1910) | Scymnodon macracanthus | Somniosidae | Largespine velvet dogfish |
| Scymnodon ringens | Barbosa du Bocage & de Brito Capello, 1864 | Scymnodon ringens | Somniosidae | Knifetooth dogfish |
| Scymnodon sherwoodi | Archey, 1921 | Scymnodalatias sherwoodi | Somniosidae | Sherwood dogfish |
| Scymnodon squamulosus | (Günther, 1877) | Zameus squamulosus | Somniosidae | Velvet dogfish |