Gyrodus

Gyrodus is an extinct genus of pycnodontiform ray-finned fish that lived from the late Triassic (Rhaetian) to the middle Cretaceous (Cenomanian).

Gyrodus Temporal range: Rhaetian-Cenomanian ~205.6–94.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N

Gyrodus hexagonus from Kelheim, Germany
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Pycnodontiformes
Family:	Pycnodontidae
Genus:	Gyrodus Agassiz 1843
Species
G. circularis G. cordillera Martill et al. 1998 G. cretaceus Agassiz 1844 G. hexagonus G. huiliches Gouiric-Cavalli et al. 2019 G. milium Henry 1876

Distribution

Fossils of Gyrodus have been found in:[1]

Triassic

Franche-Comté, France

Jurassic

Quehita and Quebrada Formations, Chile
Canjuers-Les Bessons quarry and Fumel, France
Painten Formation and Liegende Bankkalk Formation, Germany
Sot de Chera Formation, Spain
Calcareous Grit Formation, England

Cretaceous

Agrio Formation, Argentina
Ashville Formation, Canada
Zapata Formation, Chile
Baharîje Formation, Egypt
Douiret Formation, Tunisia
West Melbury Marly Chalk Formation, England

Gallery

Gyrodus hexagonus
Gyrodus circularis

References

Gyrodus at Fossilworks.org

Further reading

Fossils (Smithsonian Handbooks) by David Ward

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