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Dogfish sharks: Order squaliform |
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Page 3 of 8 Comparison of the Families of Dogfish Sharks| Family | Dogfish | Gulper
| Lantern | Angular
Roughshark | Sleeper | Kitefin | Squalidae
| Centrophoridae | Etmopteridae | Oxynotidae | Somniosidae | Dalatiidae | | # of species | 20 | 15 | 51 | 5 | 18 | 10 | | Dorsal fin | smooth spine | grooved spine | very high dorsal | deeply imbedded spine | small dorsals, grooved spines | small dorsals, no spine | | Unusual qualities | upper & lower teeth equal size | lower teeth noticably larger than upper | luminous patterns | body high, triangular; rough, large dentricles | mall pectoral, pelvic, and dorsal fins | large eyes | Includes
| Spiny dogfish, Mandarin dogfish | Gulper, Birdbeak dogfish | Lantern sharks | Roughsharks
| Portuguese, Sleeper shark
| Kitefin, Cookie-cutter, Pygmy |
 Illustrations of representative sharks of the Dogfish families. R. Aidan Martin
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