Petalodontidae

Petalodontidae; Temporal range: Lower Carboniferous to Permian
	Teeth of Petalodus ohioensis (Carboniferous).
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Holocephali
Order:	†Petalodontiformes
Family:	†Petalodontidae; Newberry & Worthen, 1866
Genera
	†Ageleodus; †Antliodus; †Chomatodus; †Ctenoptychius; †Glyphanodus; †Harpacodus; †Lisogodus; †Neopetalodus; †Paracymatodus; †Petalodus; †Polyrhizodus; †Serratodus; †Siksika; †Tanaodus;

Petalodontidae is an extinct family of marine cartilaginous fish related to the modern-day chimaeras, found in what is now the United States of America and Europe. With a very few exceptions, they are known entirely from teeth. All fossils range from the Carboniferous to the Permian, where they are presumed to have died out during the Permian/Triassic extinction event.

References

^ Petalodontidae at www.helsinki.fi

External links

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[1] Petalodontidae at www.helsinki.fi

[1]

Petalodontidae Temporal range: Lower Carboniferous to Permian

Teeth of Petalodus ohioensis (Carboniferous).
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Holocephali
Order:	†Petalodontiformes
Family:	†Petalodontidae Newberry & Worthen, 1866
Genera
†Ageleodus †Antliodus †Chomatodus †Ctenoptychius †Glyphanodus †Harpacodus †Lisogodus †Neopetalodus †Paracymatodus †Petalodus †Polyrhizodus †Serratodus †Siksika †Tanaodus^[1]