Leptolepis ("delicate scale") is an extinct genus of teleost fish that lived freshwater and marine environments from the Early Jurassic period until the Middle Jurassic, possibly even to the Early Cretaceous. The genus is one of the earliest recognized teleost genera.
Wikipedia has a more detailed and comprehensive article on Leptolepis
Jurassic Park Series
Leptolepis has never appeared or mentioned in any Jurassic Park films or books.
Games
Jurassic Park 2: The Chaos Continues
Leptolepis has only appeared in the spin-off video game Jurassic Park 2: The Chaos Continues for Game Boy.
