Ptychodontidae

Ptychodontidae; Temporal range: 99.6–61.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N Cretaceous to Paleogene
	Ptychodus janewayii teeth (bottom row) from Cope 1874
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Order:	†Hybodontiformes
Family:	†Ptychodontidae
Genera
	Ptychodus;

Ptychodontidae is a family of extinct hybodontiform sharks which lived from the Cretaceous to the Paleogene.[1]

References

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