Original description species: Underwood & Schlögl, 2013
Genus: Nanocetorhinus Underwood & Schlogl, 2013
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii

Original description species: Feichtinger, Pollerspöck & Harzhauser, 2020
Genus: Nanocetorhinus Underwood & Schlogl, 2013
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii

Synonyms: Microcorax aff. crassus, Microcorax crassus
Original description species: (Cappetta & Case, 1975)
Genus: Nanocorax Cappetta, 2012
Family: Anacoracidae Casier, 1947
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Squalicorax microserratodon
Original description species: (Shimada, 2008)
Genus: Nanocorax Cappetta, 2012
Family: Anacoracidae Casier, 1947
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Hodnett, Elliott, Olson & Wittke, 2012
Genus: Nanoskalme Hodnett, Elliott, Olson & Wittke, 2012
Family: incert. fam.
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Genus: Narcine Henle, 1834
Family: Narcinidae Gill, 1862
Order: Torpediniformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Narke Kaup, 1826
Family: Narkidae Fowler, 1934
Order: Torpediniformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Carcharhinus velox-f
Original description species: (Gilbert, 1898)
Genus: Nasolamia Compagno & Garrick, 1983
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Feichtinger, Engelbrecht, Lukeneder & Kriwet, 2018
Genus: Natarapax Feichtinger, Engelbrecht, Lukeneder & Kriwet, 2018
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Original description species: Collareta, Mollen, Merella, Casati & Di Cencio, 2021
Genus: Nebriimimus Collareta, Mollen, Merella, Casati & Di Cencio, 2021
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Ginglymostoma bequaerti, Ginglymostoma thielense bequaerti, Ginglymostoma thielensi bequaerti
Original description species: (Leriche, 1920)
Genus: Nebrius Rüppell, 1837
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Ginglymostoma blanckenhorni, Ginglymostoma blankenhorni, Ginglymostoma (Nebrius) blanckenhorni, Nebrius blankenhorni
Original description species: (Stromer, 1903)
Genus: Nebrius Rüppell, 1837
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Lesson, 1831)
Genus: Nebrius Rüppell, 1837
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Ginglymostoma aff. fourtaui, Ginglymostoma fourtaui, Ginglymostoma obliquum, Nebrius cf. obliquus, Nebrius fourtaui, Nebrius obliquum
Original description species: (Leidy, 1877)
Genus: Nebrius Rüppell, 1837
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Nebrius Rüppell, 1837
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Acrodobatis obliquus, Ginglymostoma aff. thielense, Ginglymostoma aff. thielensi, Ginglymostoma cf. thielensi, Ginglymostoma thielense, Ginglymostoma thielensi, Ginglymostoma thielensis, Ginglymostoma (Nebrius) thielensi, Nebrius aff. thielensi, Nebrius cf. thielensi, Nebrius cf. thielensis, Nebrius thielensi, Plicodus thielensis
Original description species: (Winkler, 1874)
Genus: Nebrius Rüppell, 1837
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Negaprion aff. brevirostris-f, Negaprion cf. brevirostris-f
Original description species: (Poey, 1868)
Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Canevet & Lebrun, 2021
Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Lamna eurybathrodon, Negaprion cf. eurybathrodon
Original description species: (Blake, 1862)
Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Aprionodon cf. frequens, Aprionodon frequens, Aprionodon (Carcharias) frequens, Carcharhinus aff. frequens, Carcharhinus cf. frequens, Carcharhinus frequens, Carcharhinus (Aprionodon) frequens, Carcharias (Aprionodon) aff. frequens, Carcharias (Aprionodon) frequens
Original description species: (Dames, 1883)
Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Jordan & Gilbert, 1882)
Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Alopias latidens alabamensis, Carcharhinus gilmorei, Carcharhinus greyegertoni, Hypoprion greyegertoni, Negaprion aff. gilmorei, Negaprion gibbesi gilmorei, Sphyrna gilmorei
Original description species: (Leriche, 1942)
Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Negaprion Whitley, 1940
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Cosmacanthus elegans, Nemacanthus (Cosmacanthus) elegans
Original description species: (Evans, 1904)
Genus: Nemacanthus Agassiz, 1836
Family: Palaeospinacidae Regan, 1906
Order: Synechodontiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Desmacanthus cloacinus, Nemacanthus filifer, Nemacanthus monolifer
Original description species: Agassiz, 1836
Genus: Nemacanthus Agassiz, 1836
Family: Palaeospinacidae Regan, 1906
Order: Synechodontiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Quenstedt, 1885
Genus: Nemacanthus Agassiz, 1836
Family: Palaeospinacidae Regan, 1906
Order: Synechodontiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Neoharriotta Bigelow & Schroeder, 1950
Family: Rhinochimaeridae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Hodnett, Elliott, Olson & Wittke, 2012
Genus: Neosaivodus Hodnett, Elliott, Olson & Wittke, 2012
Family: incert. fam.
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: P'an & Liu in P'an, 1975
Genus: Neosinacanthus P'an & Liu In P'an, 1975
Family: Sinacanthidae Min, 1998
Order: Sinacanthida
Subclass: Elasmobranchii

Genus: Neotrygon Castelnau, 1873
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Lund, 1989
Genus: Netsepoye Lund, 1989
Family: Obruchevodidae Lund, Grogan & Fath, 2014
Order: Petalodontiformes
Subclass: Euchondrocephali

Original description species: Wang, 1993
Genus: Nogueralepis Wang, 1993
Subclass: Elasmobranchii

Original description species: Grande & Chatterjee, 1987 (nomen nudum)
Genus: Notidanodon Cappetta, 1975
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notidanodon aff. lanceolatus, Notidanodon cf. lanceolatus, Notidanus lanceolatus
Original description species: (Woodward, 1886)
Genus: Notidanodon Cappetta, 1975
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notidanus pectinatus, Notorhynchus pectinatus
Original description species: (Agassiz, 1843)
Genus: Notidanodon Cappetta, 1975
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Aellopos wagneri, Eonotidanus muensteri, Hexanchus cf. huegeliae, Notidanoides arzoensis, Notidanoides daviesii, Notidanoides eximius, Notidanus arzoensis, Notidanus daviesii, Notidanus eximius, Notidanus huegeliae, Notidanus hügeliae, Notidanus hygeliae, Notidanus muensteri, Notidanus munsteri, Notidanus münsteri, Notidanus nikitini, Notidanus wagneri, Pachyhexanchus huegeliae
Original description species: (Agassiz, 1843)
Genus: Notidanoides Maisey, 1986
Family: Crassodontidanidae Kriwet & Klug, 2016
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Engelbrecht, Mörs, Reguero & Kriwet, 2017
Genus: Notoramphoscyllium Engelbrecht, Mörs, Reguero & Kriwet, 2017
Family: Hemiscylliidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notidanion boreale
Original description species: (Jordan & Hannibal, 1923)
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notorhynchus cepedianus-f, Notorhynchus cf. cepedianus-f, Notorynchus maculatum-f, Notorynchus maculatus-f
Original description species: (Péron, 1807)
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notorhynchus kempi, Notorynchus cf. kempi
Original description species: Ward, 1979
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notorhynchus lawleyi
Original description species: Cigala Fulgosi, 1983
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Heptranchias plectrodon, Heptranchias primigenius, Hexanchus primigenius, Hexanchus (Notidanus) primigenius, Notidanion primigenium, Notidanus aff. primigenius, Notidanus cf. primigenius, Notidanus d'anconae, Notidanus diffusidens, Notidanus marginalis, Notidanus nettelbladti, Notidanus paucidens, Notidanus plectrodon, Notidanus primigenius, Notidanus recurvus, Notidanus thevenardi, Notidanus (Heptranchias) primigenius, Notidanus (Notorhynchus) primigenius, Notorhynchus cf. primigenius, Notorhynchus primigenius, Sphyrna denticulata
Original description species: (Agassiz, 1835)
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Hexanchus serratissimus, Notidanus cf. serratissimus, Notidanus serratissimus, Notorhynchus serratissimus
Original description species: (Agassiz, 1843)
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notorhynchus sp-f
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Notidanus subrecurvus
Original description species: (Oppenheimer, 1907)
Genus: Notorynchus Ayres, 1855
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Hodnett & Elliott, 2018
Genus: Novaculodus Hodnett & Elliott, 2018
Family: Protacrodontidae Cappetta, Duffin & Zidek, 1993
Superfamily: Protacrodontoidea
Cohort: Euselachii
Subclass: Elasmobranchii