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Extinct subfamily of sharks From Wikipedia, the free encyclopedia
Johnlonginae is an extinct subfamily of sand shark with two genera: Johnlongia and Pseudomegachasma. The latter genus is thought to have evolved from former. They are among the older sand sharks, and are only known from the Cretaceous period.[1]
Johnlonginae Temporal range: | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Chondrichthyes |
Subclass: | Elasmobranchii |
Subdivision: | Selachimorpha |
Superorder: | Galeomorphii |
Order: | Lamniformes |
Family: | Odontaspididae |
Subfamily: | †Johnlonginae Shimada, 2015 |
Genera | |
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