Ptychodontidae
From Infogalactic: the planetary knowledge core
| Ptychodontidae |
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| File:Squalicorax and Ptychodus.jpg | |
| Ptychodus janewayii teeth (bottom row) from Cope 1874 | |
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Ptychodontidae
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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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