Leptostyrax

Leptostyrax; Temporal range:
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Lamniformes
Family:	†Pseudoscapanorhynchidae
Genus:	†Leptostyrax; Williston, 1900
Type species
	†Leptostyrax macrorhiza; (Cope, 1875)
Other species
	†Leptostyrax stychi ; Schmitz, Thies, & Kriwet, 2010;
Synonyms
	Genus synonymy Macrorhizodon ; Sokolov, 1965; Megarhizodon ; Sokolov, 1978; ; 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.

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.