Leptostyrax

Phylum:Chordata

Class:Chondrichthyes

Subclass:Elasmobranchii

Division:Selachii

Leptostyrax Temporal range: Barremian-Campanian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Lamniformes
Family:	†Pseudoscapanorhynchidae
Genus:	†Leptostyrax Williston, 1900[1]
Type species
†Leptostyrax macrorhiza (Cope, 1875)[2]
Other species
†Leptostyrax stychi Schmitz, Thies, & Kriwet, 2010[3]
Synonyms
Genus synonymy Macrorhizodon Sokolov, 1965[4] Megarhizodon Sokolov, 1978[5] Species synonymy L. macrorhiza Lamna macrorhiza Cope, 1875 Leptostyrax bicuspidatus Williston, 1900 Megarhizodon priscus Sokolov, 1978

Leptostyrax is an extinct genus of mackerel sharks that lived during the Cretaceous. It contains two valid species, L. macrorhiza and L. stychi, found in North America, Europe, Africa, and Australia.^[3]

Vertebrae tentatively assigned to L. macrorhiza suggest lengths of 6.3–8.3 m (21–27 ft), making it one of the largest Cretaceous sharks.^[6]