Johnlonginae

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: Late Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Superorder:	Galeomorphi
Order:	Lamniformes
Family:	Odontaspididae
Subfamily:	†Johnlonginae Shimada, 2015
Genera
Johnlongia Pseudomegachasma