Original description species: Kühn, 1942
Genus: Raineria Osswald, 1929
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Grogan & Lund, 2009
Genus: Rainerichthys Grogan & Lund, 2009
Family: Iniopterygidae Zangerl & Case, 1973
Order: Iniopterygiformes
Subclass: Holocephali

Original description species: Engelbrecht, Mors, Reguero & Kriwet, 2019
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raia antiqua
Original description species: Agassiz, 1843
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Noetling, 1885
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Actinobatis davisi, Raja minor
Original description species: (Fowler, 1958)
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case & Cappetta, 1997
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja aff. gentili, Raja cf. gentili
Original description species: Joleaud, 1912
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Ward, 1984
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Reinecke, Von Der Hocht & Gürs, 2008
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1972
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Engelbrecht, Mors, Reguero & Kriwet, 2019
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Adnet, 2006
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cicimurri & Knight, 2010
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Adnet, 2006
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dipturus aff. olisiponensis, Dipturus olisiponensis, Narcine olisiponensis, Raja aff. olisiponensis, Raja (Rostroraja) aff. olisiponensis, Rostroraja aff. olisiponensis, Rostroraja olisiponensis
Original description species: (Jonet, 1968)
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Agassiz, 1843
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja (Placolithes) philippi
Original description species: Münster, 1846
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Lawley, 1876
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Prasad & Cappetta, 1993
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Reinecke, 2015
Genus: Raja Linné, 1758
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Steininger, 1966
Genus: Rajitheca Steininger, 1966
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Steininger, 1966
Genus: Rajitheca Steininger, 1966
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja helvetica
Original description species: (Fischer-Ooster, 1866)
Genus: Rajitheca Steininger, 1966
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Duffin, 1981
Genus: Recurvacanthus Duffin, 1981
Family: Myriacanthidae Woodward, 1889
Suborder: Myriacanthoidei
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Koot, Cuny, Tintori & Twitchett, 2013
Genus: Reesodus Koot, Cuny, Tintori & Twitchett, 2013
Family: Lonchidiidae Herman, 1977
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Lissodus wirksworthensis
Original description species: (Duffin, 1985)
Genus: Reesodus Koot, Cuny, Tintori & Twitchett, 2013
Family: Lonchidiidae Herman, 1977
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Turner & Burrow, 2011
Genus: Reginaselache Turner & Burrow, 2011
Family: Diplodoselachidae Dick, 1981
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: Ivanov, 2021
Genus: Reifella Ivanov, 2021
Family: Anachronistidae Duffin & Ward, 1983
Order: incert. sedis
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Reifia aff. minuta
Original description species: Duffin, 1980
Genus: Reifia Duffin, 1980
Family: incert. fam.
Order: incert. sedis
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Werner, 1989
Genus: Renpetia Werner, 1989
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Squatirhina americana
Original description species: (Estes, 1964)
Genus: Restesia Cook, Newbrey, Brinkman & Kirkland, 2014
Family: Orectolobidae Gill, 1896
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Wynd, Demar & Wilson, 2020
Genus: Restesia Cook, Newbrey, Brinkman & Kirkland, 2014
Family: Orectolobidae Gill, 1896
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Murry & Kirby, 2002
Genus: Reticulodus Murry & Kirby, 2002
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Böhm, 1926
Genus: Rhaibodus Böhm, 1926
Family: Triakidae Gray, 1851
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Mendiola, 1996
Genus: Rhincodon Smith, 1829
Family: Rhincodontidae Garman, 1913
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Averianov & Udovitshenko, 1993
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatos aff. antunesi, Rhinobatus antunesi
Original description species: (Jonet, 1968)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Adnet, 2006
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Platyrhina bruxelliensis, Rhinobatos aff. bruxelliensis, Rhinobatos cf. bruxelliensis, Rhinobatus bruxelliensis
Original description species: (Jaekel, 1894)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatos cf. casieri
Original description species: Herman, 1977
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case & Cappetta, 1997
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta & Corral, 1999
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatus grandis
Original description species: (Davis, 1887)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1980
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta & Corral, 1999
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatos cf. incertus
Original description species: Cappetta, 1973
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Kriwet, 1999
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatus intermedius
Original description species: (Davis, 1887)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta & Case, 1999
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta & Case, 1999
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatus latus
Original description species: (Davis, 1887)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta & Case, 1999
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Bor, 1983
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatus maronita
Original description species: (Pictet & Humbert, 1866)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Belemnobatis cf. picteti
Original description species: Cappetta, 1975
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Sahni & Mehrotra, 1981
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Guinot, Cappetta, Underwood & Ward, 2012
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatos cf. steurbauti
Original description species: Cappetta & Nolf, 1981
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatus tenuirostris
Original description species: (Davis, 1887)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinobatus tesselatus
Original description species: (Von Der Marck, 1894)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case & Cappetta, 1997
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja whitfieldi
Original description species: (Hay, 1903)
Genus: Rhinobatos Linck, 1790
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Vosin, 1968
Genus: Rhinochimaera Garman, 1901
Family: Rhinochimaeridae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Obruchev, 1967
Genus: Rhinochimaera Garman, 1901
Family: Rhinochimaeridae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Woodward, 1907
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinoptera cf. raeburni
Original description species: White, 1934
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Böhm, 1926
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinoptera cf. schultzi
Original description species: Hiden, 1995
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhinoptera aff. sherburni, Rhinoptera cf. sherborni
Original description species: White, 1926
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Aetobatus smithii, Rhinoptera smithi
Original description species: Jordan & Beal, 1913
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Myliobatis studeri, Myliobatis studerii, Rhinoptera aff. studeri, Rhinoptera aff. studerii, Rhinoptera cf. studeri, Rhinoptera dubia, Rhinoptera stüderi, Zygobates dubia, Zygobates dubius, Zygobates studeri, Zygobatis studeri
Original description species: (Agassiz, 1843)
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Myliobates woodwardii, Zygobates woodwardi, Zygobates woodwardii
Original description species: (Agassiz, 1843)
Genus: Rhinoptera Cuvier, 1829
Family: Rhinopteridae Jordan & Evermann, 1896
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, Morrison & Adnet, 2019
Genus: Rhinoscymnus Gill, 1865
Family: Somniosidae Jordan, 1888
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Cretascymnus quimbalaensis
Original description species: (Antunes & Cappetta, 2002)
Genus: Rhinoscymnus Gill, 1865
Family: Somniosidae Jordan, 1888
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Welton & Goedert, 2016
Genus: Rhinoscymnus Gill, 1865
Family: Somniosidae Jordan, 1888
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Silva Santos & Travassos, 1960
Genus: Rhizochlatrus Silva Santos & Travassos, 1960
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Guo-Qing, 1995
Genus: Rhizoprionodon Whitley, 1929
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Klunzinger, 1879
Genus: Rhizoprionodon Whitley, 1929
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Carcharias blayaci, Carcharias (Physodon) ficheuri, Physodon fischeuri, Physodon miocaenus, Rhizoprionodon aff. ficheuri, Rhizoprionodon aff. fischeuri, Rhizoprionodon blayaci, Rhizoprionodon cf. ficheuri, Rhizoprionodon fischeuri
Original description species: (Joleaud, 1912)
Genus: Rhizoprionodon Whitley, 1929
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhizoprionodon aff. ganntourensis, Rhizoprionodon cf. ganntourensis, Rhizoprionodon gantourensis, Scoliodon aff. ganntourensis, Scoliodon ganntourensis
Original description species: (Arambourg, 1952)
Genus: Rhizoprionodon Whitley, 1929
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhomaleodus cf. budurovi
Original description species: Andreev & Cuny, 2012
Genus: Rhomaleodus Andreev & Cuny, 2012
Family: incert. fam.
Order: incert. sedis
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Noubhani & Cappetta, 1994
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhombodus binckhorsti, Rhombodus brinckhorsti, Rhombodus brinkhorsti, Rhombodus cf. binkhorsti, Rhombodus haasi
Original description species: Dames, 1881
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Vullo, 2005
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Kriwet & Soler-Gijón & López-Martínez, 2007
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Kriwet & Soler-Gijón & López-Martínez, 2007
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhombodus cf. levis, Rhombodus laevis
Original description species: Cappetta & Case, 1975
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhombodus aff. meridionalis
Original description species: Arambourg, 1952
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Arambourg, 1952
Genus: Rhombodus Dames, 1881
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1980
Genus: Rhombopterygia Cappetta, 1980
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Vullo & Courville, 2014
Genus: Rhombopterygia Cappetta, 1980
Family: Rhinobatidae Bonaparte, 1835
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Hybodonchus minor, Hybodus aff. minor, Hybodus cf. minor, Hybodus longiconus minor , Hybodus minor, Hybodus similis
Original description species: (Agassiz, 1837)
Genus: Rhomphaiodon Duffin, 1993
Family: incert. fam.
Order: incert. sedis
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Duffin, 1993
Genus: Rhomphaiodon Duffin, 1993
Family: incert. fam.
Order: incert. sedis
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Pristis angustior, Pristis pristinus, Rhynchobatus aff. pristinus, Rhynchobatus angustior, Rhynchobatus cf. pristinus, Rhynchobatus mayeri, Rhynchobatus probsti
Original description species: (Probst, 1877)
Genus: Rhynchobatus Müller & Henle, 1837
Family: Rhinidae Müller & Henle, 1841
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Laurito Mora, 1999
Genus: Rhynchobatus Müller & Henle, 1837
Family: Rhinidae Müller & Henle, 1841
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhynchobatis vincenti, Rhynchobatus cf. vincenti
Original description species: Jaekel, 1894
Genus: Rhynchobatus Müller & Henle, 1837
Family: Rhinidae Müller & Henle, 1841
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus bracheri
Original description species: (Pfeil, 1983)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus cf. fiedleri, Chlamydoselachus fiedleri, Proteothrinax baumgartneri, Rolfodon baumgartneri, Thrinax baumgartneri
Original description species: (Pfeil, 1983)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus goliath
Original description species: (Antunes & Cappetta, 2002)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus keyesi
Original description species: (Mannering & Hiller, 2008)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus landinii
Original description species: (Carrillo-Briceño, Aguilera & Rodriguez, 2014)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, Morrison & Adnet, 2019
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus tatere
Original description species: (Consoli, 2008)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chlamydoselachus thomsoni, Rolfodon cf. thomsoni
Original description species: (Richter & Ward, 1990)
Genus: Rolfodon Cappetta, Morrison & Adnet, 2019
Family: Chlamydoselachidae Garman, 1884
Suborder: Chlamydoselachoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Zangerl, 1981
Genus: Romerodus Zangerl, 1981
Family: Caseodontidae Zangerl, 1981
Superfamily: Caseodontoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: Sansom, Aldridge & Smith, 2000
Genus: Rongolepis Sansom, Aldridge & Smith, 2000
Family: Mongolepididae Karatajute-Talimaa & Novitskaya, 1990
Order: Mongolepidida

Original description species: Hairapetian & Ginter, 2009
Genus: Roongodus Hairapetian & Ginter, 2009
Family: Polyacrodontidae Glickman, 1964
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Li, Sun, Cuny, Ji, Jiang & Zhou, 2021
Genus: Rosaodus Li, Sun, Cuny, Ji, Jiang & Zhou, 2021
Order: incert. sedis
Subclass: Elasmobranchii

Original description species: Vullo & Cappetta & Néraudeau, 2007
Genus: Roulletia Vullo, Cappetta & Néraudeau, 2007
Family: Odontaspididae Müller & Henle, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Underwood & Cumbaa, 2010
Genus: Roulletia Vullo, Cappetta & Néraudeau, 2007
Family: Odontaspididae Müller & Henle, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Figueroa & Gallo, 2017
Genus: Rubencanthus Figueroa & Gallo, 2017
Family: Sphenacanthidae Maisey, 1982
Order: incert. sedis
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Zhang, Chen, Cheng & Zhang, 2012
Genus: Rugosicorona Johns, Barnes, & Orchard, 1997
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii