| Ptychodus Temporal range: 99.6–61.7 Ma Cretaceous to Paleogene |
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|---|---|
| Ptychodus mortoni | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Superorder: | Selachimorpha |
| Order: | †Hybodontiformes |
| Superfamily: | Hybodontoidea |
| Family: | Ptychodontidae |
| Genus: | Ptychodus Agassiz |
| Species | |
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Ptychodus is a genus of extinct[1] hybodontiform shark which lived from the Cretaceous to the Paleogene.[2] Ptychodus was about 32 feet long (10 meters) and was unearthed in Kansas, United States.[3]