Paraisurus

Paraisurus is an extinct genus of mackerel sharks that lived during the Cretaceous. It contains four valid species, which have been found in Europe, Asia, North America, and Australia.^[7] A fifth species, P. amudarjensis, is now considered a synonym of P. compressus.^[8] While this genus is mostly known from isolated teeth, an associated dentition of P. compressus was found in the Weno Formation of Texas.^[9] It went extinct around the Albian-Cenomanian boundary, as a supposed Coniacian occurrence of "P. sp." is likely a misidentified pseudoscapanorhynchid.^[10]

Paraisurus Temporal range: Aptian-Albian PreꞒ Ꞓ O S D C P T J K Pg N
Teeth of P. macrorhizus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Lamniformes
Family:	†Paraisuridae Herman, 1979[1]
Genus:	†Paraisurus Glickman, 1957[2]
Type species
†Paraisurus macrorhizus (Pictet & Campiche, 1858)[3]
Species
†Paraisurus compressus Sokolov 1978[4][5] †Paraisurus macrorhizus Pictet and Campiche 1858[5][3]
Synonyms
Species synonymy Paraisurus macrorhizus Oxyrhina macrorhiza Pictet & Campiche, 1858 Paraisurus compressus Paraisurus amudarjensis Mertinienė, Nessov, & Nazarkin, 1994[6]