Paraisurus

Paraisurus Temporal range:
Teeth of P. macrorhizus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Lamniformes
Family:	†Paraisuridae Herman, 1979
Genus:	†Paraisurus Glickman, 1957
Type species
†Paraisurus macrorhizus (Pictet & Campiche, 1858)
Species
†Paraisurus compressus Sokolov 1978 †Paraisurus macrorhizus Pictet and Campiche 1858
Synonyms
Species synonymy Paraisurus macrorhizus Oxyrhina macrorhiza Pictet & Campiche, 1858 Paraisurus compressus Paraisurus amudarjensis Mertinienė, Nessov, & Nazarkin, 1994

Paraisurus is an extinct genus of mackerel sharks that lived during the Cretaceous period. It contains four valid species, which have been found in Europe, Asia, North America, and Australia. A fifth species, P. amudarjensis, is now considered a synonym of P. compressus. While this genus is mostly known from isolated teeth, an associated dentition of P. compressus was found in the Weno Formation of Texas. It went extinct around the Albian-Cenomanian boundary, as a supposed Coniacian occurrence of "P. sp." is likely a misidentified pseudoscapanorhynchid.