Original description species: WERNER, 1989
Genus: Baharipristis WERNER, 1989
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Lissodus bartheli
Original description species: (WERNER, 1989)
Genus: Bahariyodon DUFFIN, 2001
Family: Polyacrodontidae GLICKMAN, 1964
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Bandringa herdinae
Original description species: ZANGERL, 1969
Genus: Bandringa ZANGERL, 1969
Family: Bandringidae ZANGERL, 1969
Superfamily: Ctenacanthoidea
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Barbclabornia cf. luederensis, Xenacanthus luedersensis
Original description species: (BERMAN, 1970)
Genus: Barbclabornia JOHNSON, 2003
Family: incert. fam.
Order: Bransonelliformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: DUFFIN, 1995
Genus: Bathytheristes DUFFIN, 1995
Family: Callorhinchidae GARMAN, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: THIES, 2005
Genus: Bavariscyllium THIES, 2005
Family: Scyliorhinidae GILL, 1862
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: QUENSTEDT, 1882
Genus: Bdellodus QUENSTEDT, 1882
Family: Acrodontidae CASIER, 1959
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: LUND & GROGAN, 2004
Genus: Bealbonn LUND & GROGAN, 2004
Family: Gregoriidae LUND & GROGAN, 2004
Subclass: Euchondrocephali

Original description species: LUND, 1989
Genus: Belantsea LUND, 1989
Family: Belantseidae LUND, 1989
Order: Petalodontiformes
Subclass: Euchondrocephali

Genus: Belantsea LUND, 1989
Family: Belantseidae LUND, 1989
Order: Petalodontiformes
Subclass: Euchondrocephali

Original description species: CUNY, SRISUK, KHAMHA, SUTEETHORN & TONG, 2009
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: UNDERWOOD & WARD, 2004
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Belemnobatis cf. moorbergensis, Spathobatis moorbergensis
Original description species: (THIES, 1983)
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (SAUVAGE 1873)
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: DELSATE & CANDONI, 2001
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Belemnobatis aff. sismondae
Original description species: THIOLLIÈRE, 1852
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: UNDERWOOD & WARD, 2004
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Belemnobatis aff. variabilis
Original description species: UNDERWOOD & REES, 2002
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Spathobatis werneri
Original description species: (THIES, 1983)
Genus: Belemnobatis THIOLLIÈRE, 1852
Family: Spathobatidae UNDERWOOD, 2006
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: ZANGERL, 1990
Genus: Bethacanthus ZANGERL, 1990
Family: Stethacanthidae LUND, 1974
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: SUÁREZ & CAPPETTA, 2004
Genus: Biropristis SUÁREZ & CAPPETTA, 2004
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: ZANGERL, 1981
Genus: Bobbodus ZANGERL, 1981
Family: Eugeneodontidae ZANGERL, 1981
Superfamily: Caseodontoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: ZANGERL, 1981
Genus: Bobbodus ZANGERL, 1981
Family: Eugeneodontidae ZANGERL, 1981
Superfamily: Caseodontoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: HAMPE, HAIRAPETIAN, DORKA, WITZMANN, AKBARI & KORN, 2013
Genus: Bobbodus ZANGERL, 1981
Family: Eugeneodontidae ZANGERL, 1981
Superfamily: Caseodontoidae
Order: Eugeneodontiformes
Subclass: Euchondrocephali

Original description species: (FRITSCH, 1890)
Genus: Bohemiacanthus SCHNEIDER, 1994
Family: Xenacanthidae FRITSCH, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: GAGNIER, TURNER, FRIMAN,SUAREZ-RIGLOS & JANVIER, 1988
Genus: Bolivacanthus GAGNIER, TURNER, FRIMAN,SUAREZ-RIGLOS & JANVIER, 1988
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii

Original description species: ZHELEZKO IN ZHELEZKO & KOZLOV, 1999
Genus: Borealotodus ZHELEZKO IN ZHELEZKO & KOZLOV, 1999
Family: Odontaspididae MÜLLER & HENLE, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Mennerotodus borealis
Original description species: ZHELEZKO IN ZHELEZKO & KOZLOV, 1999
Genus: Borealotodus ZHELEZKO IN ZHELEZKO & KOZLOV, 1999
Family: Odontaspididae MÜLLER & HENLE, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Borodinopristis cf. ackermani
Original description species: CASE, SCHWIMMER, BORODIN & LEGGETT, 2001
Genus: Borodinopristis CASE, 1987
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: CASE, 1987
Genus: Borodinopristis CASE, 1987
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: CASE, COOK, WILSON & BORODIN, 2012
Genus: Borodinopristis CASE, 1987
Family: Sclerorhynchidae CAPPETTA, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: BERNARDEZ, 2002
Genus: Brachaelurus OGILBY, 1907
Family: Brachaeluridae APPLEGATE, 1974
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: CASE, BORODIN & LEGGETT, 2001
Genus: Brachaelurus OGILBY, 1907
Family: Brachaeluridae APPLEGATE, 1974
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: MOREAU & MATHIS, 2000
Genus: Brachaelurus OGILBY, 1907
Family: Brachaeluridae APPLEGATE, 1974
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Brachyacanthus semiplanus
Original description species: FRITSCH, 1889
Genus: Brachiacanthus FRITSCH, 1889
Family: incert. fam.
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Synonyms: Carcharias aff. koerti , Carcharias koerti, Odontaspis cf. koerti, Odontaspis koerti, Odontaspis (Parodontaspis) koerti, Odontaspis (Synodontaspis) koerti, Otodus koerti, Serratolamna koerti, Synodontaspis koerti
Original description species: (STROMER, 1910)
Genus: Brachycarcharias CAPPETTA & NOLF, 2005
Family: Odontaspididae MÜLLER & HENLE, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Carcharias lerichei, Isurolamna lerichei, Lamna aff. lerichei, Lamna lerichei, Serratolamna lerichei
Original description species: (CASIER, 1946)
Genus: Brachycarcharias CAPPETTA & NOLF, 2005
Family: Odontaspididae MÜLLER & HENLE, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Pseudodontaspis mississippiensis
Original description species: (CASE, 1994)
Genus: Brachycarcharias CAPPETTA & NOLF, 2005
Family: Odontaspididae MÜLLER & HENLE, 1839
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Brachymylus cf. altidens
Original description species: WOODWARD, 1892
Genus: Brachymylus WOODWARD, 1892
Family: Callorhinchidae GARMAN, 1901
Order: Chimaeriformes
Subclass: Holocephali

Original description species: AVERIANOV, 1992
Genus: Brachymylus WOODWARD, 1892
Family: Callorhinchidae GARMAN, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Brachyrhizodus mcnultii, Hypolophus mcnultyi, Pseudohypolophus cf. mcnultyi, Pseudohypolophus macnultyi, Pseudohypolophus mcnultyi
Original description species: (THURMOND, 1971)
Genus: Brachyrhizodus ROMER, 1942
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Synonyms: Brachyrhizodus cf. wichitaensis
Original description species: ROMER, 1942
Genus: Brachyrhizodus ROMER, 1942
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Original description species: IVANOV & GINTER, 1996
Genus: Bransonella HARLTON, 1933
Family: incert. fam.
Order: Bransonelliformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Synonyms: Bransonella cf. nebraskensis, Xenacanthus nebraskensis
Original description species: (JOHNSON, 1984)
Genus: Bransonella HARLTON, 1933
Family: incert. fam.
Order: Bransonelliformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: ELLIOTT & HODNETT, 2013
Genus: Bransonella HARLTON, 1933
Family: incert. fam.
Order: Bransonelliformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Valid name: Xenacanthus tridentatus
Original description species: HARLTON, 1933
Genus: Bransonella HARLTON, 1933
Family: incert. fam.
Order: Bransonelliformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Synonyms: Breviacanthus brevispinus, Nemacanthus brevis, Nemacanthus brevispinus
Original description species: PHILLIPS, 1871
Genus: Breviacanthus MAISEY, 1976
Family: Palaeospinacidae REGAN, 1906
Order: Synechodontiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja primarmata, Rhinobatos aff. primarmatus, Rhinobatos berytensis, Rhinobatos primarmatus, Rhinobatus berytensis
Original description species: (WOODWARD, 1889)
Genus: Britobatos CLAESON, UNDERWOOD & WARD, 2013
Family: Trygonorrhinidae LAST, SÉRET & NAYLOR, 2016
Order: Rhinopristiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Burnhamia aff. daviesi, Burnhamia (Rhinoptera) daviesi, Rhinoptera daviesi, Rhinoptera daviesii
Original description species: (WOODWARD, 1889)
Genus: Burnhamia CAPPETTA, 1976
Family: Mobulidae BONAPARTE, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Chomatodus davisi, Petalodus davisii
Original description species: (WOODWARD, 1889)
Genus: Burnhamia CAPPETTA, 1976
Family: Mobulidae BONAPARTE, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: CAPPETTA, 1985
Genus: Burnhamia CAPPETTA, 1976
Family: Mobulidae BONAPARTE, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Bythiacanthus aff. ianishevskyi
Original description species: (KHABAKOB)
Genus: Bythiacanthus ST. JOHN & WORTHEN, 1875
Family: Heslerodidae MAISEY, 2010
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: FIGUEROA & GALLO, 2017
Genus: Bythiacanthus ST. JOHN & WORTHEN, 1875
Family: Heslerodidae MAISEY, 2010
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Synonyms: Ctenacanthus lucasi
Original description species: (EASTMAN, 1902)
Genus: Bythiacanthus ST. JOHN & WORTHEN, 1875
Family: Heslerodidae MAISEY, 2010
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Synonyms: Asteracanthus siderius, Bythiacanthus cf. siderius
Original description species: (LEIDY, 1870)
Genus: Bythiacanthus ST. JOHN & WORTHEN, 1875
Family: Heslerodidae MAISEY, 2010
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Synonyms: Ctenacanthus solidus
Original description species: (EASTMAN, 1902)
Genus: Bythiacanthus ST. JOHN & WORTHEN, 1875
Family: Heslerodidae MAISEY, 2010
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii