Ptychodontidae
| Ptychodontidae | |
|---|---|
 | |
| Ptychodus janewayii teeth (bottom row) from Cope 1874 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Order: | †Hybodontiformes |
| Family: | †Ptychodontidae |
| Genera | |
Ptychodontidae is a family of extinct hybodontiform sharks which lived from the Cretaceous to the Paleogene.[1]
References
- ↑ The paleobioloy Database Ptychodontidae entry accessed on 8/23/09
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