Megactenopetalus

Megactenopetalus
Temporal range: Kungurian– Wuchiapingian
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Petalodontiformes
Family: Pristodontidae
Genus: Megactenopetalus
David, 1944

Megactenopetalus is an extinct genus of petalodont fish which lived from the late Early Permian through the Late Permian. It is known from a single species: M. kaibabanus. It was one of the last and largest petalodonts; estimates place it at 1.6 meters or 5.2 feet in length with a 20 centimeter or 7 inch mouth. It is known from the southwest of the United States, the Middle East, and China. The holotype was an upper left dentary which came from the Kaibab Formation on the northern rim of the Grand Canyon. It is probably closely related to Ctenoptychius.


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