Original description species: Zangerl, 1979
Genus: Dabasacanthus Zangerl, 1979
Family: fam. indet
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Centrina bassanii, Dalatias bassanii, Dalatias cf. licha-f, Isistius acutus, Scymnorhinus licha-f, Scymnus acutus, Scymnus licha-f, Scymnus lichia-f, Scymnus majori
Original description species: (Bonnaterre, 1788)
Genus: Dalatias Rafinesque, 1810
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Malyshkina, 2022
Genus: Dalatias Rafinesque, 1810
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Centrina sp-f, Scymnus sp-f
Genus: Dalatias Rafinesque, 1810
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Glikman, 1964
Genus: Dalatias Rafinesque, 1810
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Siversson, Cederström & Ryan, 2022
Genus: Dallasiella Cappetta & Case, 1999
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dallasiella cf. willistoni
Original description species: Cappetta & Case, 1999
Genus: Dallasiella Cappetta & Case, 1999
Family: Cretoxyrhinidae Glickman, 1958
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dalmehodus cf. turnerae
Original description species: Long & Hairapetian, 2000
Genus: Dalmehodus Long & Hairapetian, 2000
Family: Protacrodontidae Cappetta, Duffin & Zidek, 1993
Superfamily: Protacrodontoidea
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dalpiazia maroccana, Onchosaurus cf. maroccanus, Onchosaurus manzadinensis, Onchosaurus maroccanus, Onchosaurus (Ischirhiza) maroccanus, Onchosaurus (Ischyrhiza) maroccanus, Onchosaurus (Ischyrhiza) stromeri
Original description species: Checchia-Rispoli, 1933
Genus: Dalpiazia Checchia-Rispoli, 1933
Family: Sclerorhynchidae Cappetta, 1974
Suborder: Sclerorhynchoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Lund, 1986
Genus: Damocles Lund, 1986
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Synonyms: Centroselachus goordi, Squaliodalatias goordi
Original description species: (Mannering & Hiller, 2008)
Genus: Danodalatias Popov & Lopyrev & Yarkov, 2024
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Popov, Lopyrev & Yarkov, 2024
Genus: Danodalatias Popov & Lopyrev & Yarkov, 2024
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Noubhani & Cappetta, 1997
Genus: Danogaleus Noubhani & Cappetta, 1997
Family: Carcharhinidae Jordan & Evermann, 1896
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Potamotrygon africana
Original description species: (Arambourg, 1947)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Trygon aff. alveolatus, Trygon alveolatus
Original description species: (Leriche, 1942)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case, 1981
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1975
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Averianov & Udovitshenko, 1993
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Trygon carolinensis
Original description species: (Emmons, 1858)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis aff. charlisae
Original description species: Case, 1981
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis cf. commercensis
Original description species: Case & Cappetta, 1997
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cvancara & Hoganson, 1993
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case, 1996
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Noubhani & Cappetta, 1997
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis aff. delfortriei, Dasyatis cf. delfortriei
Original description species: Cappetta, 1970
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Molin, 1861)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Laurito Mora, 1999
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja dux, Trygon dux
Original description species: (Cope, 1867)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Dekay, 1842)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Halter, 1989)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis cf. hexagonalis
Original description species: Arambourg, 1952
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Sahni & Mehrotra, 1981
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis marmorata pastinaca-f
Original description species: (Steindachner, 1892)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Noubhani & Cappetta, 1997
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasybatus masudae
Original description species: (Hatai & Kotaka, 1962)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1970
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Acipenser molassicus, Dasyatis molassicus, Raja molassicus
Original description species: (Probst, 1882)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1975
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Case, Borodin & Leggett, 2001
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasybatus nipponensis
Original description species: (Hatai & Kotaka, 1962)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Hoganson, Erickson & Holland, 2019
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis cf. pastinaca-f
Original description species: (Linnaeus, 1758)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Trigon pastinacoides
Original description species: (Van Beneden, 1873)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Noubhani & Cappetta, 1997
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Williamson & Lucas, 1993
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Marsh, 1877)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Kumar & Loyal, 1987
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Guinot, Hautier, Sambou & Martin, 2023
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis cf. rugosa, Dasyatis cf. rugosus, Raja praeclavata, Raja rugosa, Trygon cf. rugosus, Trygon rugosus
Original description species: (Probst, 1877)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis aff. russelli
Original description species: Cappetta, 1972
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1975
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1970
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1972
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Underwood, Mitchell & Veltkamp, 1999
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis aff. strangulata, Dasyatis cf. strangulata, Raja strangulata, Trygon strangulatus
Original description species: (Probst, 1877)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Dasyatis aff. sudrei
Original description species: Cappetta, 1972
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: (Lawley, 1876)
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Arambourg, 1952
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Averianov & Udovitshenko, 1993
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Williamson & Lucas, 1993
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Loyal, 1984
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Ward, 1979
Genus: Dasyatis Rafinesque, 1810
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Marramà, Villalobos-Segura, Zorzin, Kriwet & Carnevale, 2023
Genus: Dasyomyliobatis Marramà, Villalobos-Segura, Zorzin, Kriwet & Carnevale, 2023
Family: Dasyomyliobatidae Marramà, Villalobos-Segura, Zorzin, Kriwet & Carnevale, 2023
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Rhombodus bondoni
Original description species: (Arambourg, 1952)
Genus: Dasyrhombodus Noubhani & Cappetta, 1994
Family: Dasyatidae Jordan & Gilbert, 1879
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Petralodopsis tripartitus
Original description species: (Davis, 1883)
Genus: Davodus Hansen, 1985
Family: Pristodontidae Woodward, 1889
Order: Petalodontiformes
Subclass: Euchondrocephali

Synonyms: Deania cf. angoumeensis
Original description species: Adnet, 2006
Genus: Deania Jordan & Snyder, 1902
Family: Centrophoridae Bleeker, 1859
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Deania aff. calcea-f, Deania aff. calceus-f, Deania calcea-f, Deania cf. calcea-f
Original description species: (Lowe, 1839)
Genus: Deania Jordan & Snyder, 1902
Family: Centrophoridae Bleeker, 1859
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Deania Jordan & Snyder, 1902
Family: Centrophoridae Bleeker, 1859
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Grogan & Lund, 2000
Genus: Debeerius Grogan & Lund, 2000
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Synonyms: Deihim cf. mansureae
Original description species: Ginter, Hairapetian & Klug, 2002
Genus: Deihim Ginter, Hairapetian & Klug, 2002
Family: Protacrodontidae Cappetta, Duffin & Zidek, 1993
Superfamily: Protacrodontoidea
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Lund, 1980
Genus: Delphyodontos Lund, 1980
Subclass: Holocephali

Original description species: Noubhani & Cappetta, 1997
Genus: Delpitia Noubhani & Cappetta, 1997
Family: incert. fam.
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Ginglymostoma aff. africanum, Ginglymostoma africanum, Ginglymostoma cf. africanum
Original description species: (Leriche, 1927)
Genus: Delpitoscyllium Noubhani & Cappetta, 1997
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Ginglymostoma dartevellei
Original description species: (Casier, 1946)
Genus: Delpitoscyllium Noubhani & Cappetta, 1997
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Scyliorhinus planus, Scyllium planum
Original description species: (Davis, 1890)
Genus: Delpitoscyllium Noubhani & Cappetta, 1997
Family: Ginglymostomatidae Gill, 1862
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Genus: Deltalepis Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Family: Elegestolepididae Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Order: Elegestolepidida

Original description species: Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Genus: Deltalepis Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Family: Elegestolepididae Andreev, Coates, Karatajute-Talimaa, Shelton, Cooper & Sansom, 2017
Order: Elegestolepidida

Synonyms: Cochliodus crassus, Deltodus cf. angularis, Deltodus grandis, Orthopleurodus carbonarius, Psammodus rhomboideus, Psammodus semicylindricus, Sandalodus carbonarius, Sandalodus grandis, Trigonodus major
Original description species: Newberry & Worthen, 1866
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Poecilodus concha, Poecilodus limbatus
Original description species: (Trautschold, 1874)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: (St. John & Worthen, 1883)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Woodward, 1889
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Psephodus legrandensis
Original description species: (Branson, 1905)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Deltodus aff. mercurei, Deltodus mercuri, Deltodus mercurii
Original description species: Newberry, 1876
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Taeniodus obliquus
Original description species: (St. John & Worthen, 1883)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Cochliodus occidentalis, Deltodus stellatus, Sandalodus occidentalis
Original description species: (Leidy, 1857)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Cope, 1894
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Sandalodus robustus
Original description species: (De Koninck, 1878)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Woodward, 1889
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Newberry & Worthen, 1866
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Deltodus cf. sublaevis, Deltodus expansus, Poecilodus parallelus, Poecilodus sublaevis
Original description species: (M'Coy, 1855)
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Richards, Sherwin, Smithson, Bennion, Davies, Marshall & Clack, 2018
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Deltodus cf. undulatus
Original description species: Newberry & Worthen, 1866
Genus: Deltodus Morris & Roberts, 1862
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Synonyms: Cochliodus acutus, Cochliodus compactus, Deltoptychius cf. acutus
Original description species: (M'Coy, 1855)
Genus: Deltoptychius Morris & Roberts, 1862
Subclass: Holocephali

Synonyms: Oracanthus armigerus
Original description species: (Traquair, 1887)
Genus: Deltoptychius Morris & Roberts, 1862
Subclass: Holocephali

Original description species: Davis, 1883 (ex Agassiz MSS.)
Genus: Deltoptychius Morris & Roberts, 1862
Subclass: Holocephali

Original description species: Ivanov, 1999
Genus: Denaea Pruvost, 1922
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Synonyms: Denaea cf. fournieri
Original description species: Pruvost, 1922
Genus: Denaea Pruvost, 1922
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Original description species: Ivanov, 2024
Genus: Denaea Pruvost, 1922
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Original description species: Ginter & Hansen, 2010
Genus: Denaea Pruvost, 1922
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Original description species: Wang, Jin & Wang, 2004
Genus: Denaea Pruvost, 1922
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Synonyms: Denaea cf. williamsi
Original description species: Ginter & Hansen, 2010
Genus: Denaea Pruvost, 1922
Family: Falcatidae Zangerl, 1990
Order: Symmoriiformes
Superorder: Cladodontomorphi
Subclass: Holocephali

Original description species: Whiteaves, 1897
Genus: Dendrodus Whiteaves, 1897
Family: Protodontidae Woodward, 1932
Order: incert. sedis
Subclass: Elasmobranchii

Original description species: Ivanov, Kovalenko, Murashev & Podurets, 2023
Genus: Desinia Ivanov, Kovalenko, Murashev & Podurets, 2023
Family: Sphenacanthidae Maisey, 1982
Order: incert. sedis
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: St. John & Worthen, 1875
Genus: Desmiodus St. John & Worthen, 1875
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Original description species: St. John & Worthen, 1875
Genus: Desmiodus St. John & Worthen, 1875
Family: incert. fam.
Order: incert. sedis
Subclass: Euchondrocephali

Original description species: Hodnett, Elliott & Olson, 2013
Genus: Diablodontus Hodnett, Elliott & Olson, 2013
Family: incert. fam.
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Roelofs, Playton, Barham & Trinajstic, 2015
Genus: Diademodus Harris, 1951
Family: Phoebodontidae Williams In Zangerl 1981
Order: Phoebodontiformes
Subclass: Elasmobranchii

Original description species: Ginter, 2008
Genus: Diademodus Harris, 1951
Family: Phoebodontidae Williams In Zangerl 1981
Order: Phoebodontiformes
Subclass: Elasmobranchii

Synonyms: Anodontacanthus fastigiatus, Cladodus bicuspidatus, Pleuracanthus fastigiatus
Original description species: (Traquair, 1881)
Genus: Dicentrodus Traquair, 1888
Family: Diplodoselachidae Dick, 1981
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Synonyms: Helodus dens-humani, Helodus denshumani
Original description species: (Newberry & Worthen, 1866)
Genus: Diclitodus Davis, 1883
Family: Helodontidae Patterson, 1965
Order: Helodontiformes
Superorder: Paraselachimorpha
Subclass: Holocephali

Original description species: Davis, 1883
Genus: Diclitodus Davis, 1883
Family: Helodontidae Patterson, 1965
Order: Helodontiformes
Superorder: Paraselachimorpha
Subclass: Holocephali

Original description species: Davis, 1884
Genus: Diplacodus Davis, 1884
Family: Cochliodontidae Owen, 1867
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali

Original description species: Lebedev, 1996
Genus: Diplodoselache Dick, 1981
Family: Diplodoselachidae Dick, 1981
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Synonyms: Diplodus parvulus
Original description species: (Traquair, 1881)
Genus: Diplodoselache Dick, 1981
Family: Diplodoselachidae Dick, 1981
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Synonyms: Diplodus minutus, Diploselache woodi
Original description species: Dick, 1981
Genus: Diplodoselache Dick, 1981
Family: Diplodoselachidae Dick, 1981
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: Quenstedt, 1882
Genus: Diplodus Agassiz, 1843
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Heckert, 2004
Genus: Diplolonchidion Heckert, 2004
Family: Lonchidiidae Herman, 1977
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Stumpf, Scheer & Kriwet, 2019
Genus: Diprosopovenator Stumpf, Scheer & Kriwet, 2019
Family: Pseudoscyliorhinidae Stumpf, Scheer & Kriwet, 2019
Order: Carcharhiniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Raja casieri, Raja cf. casieri
Original description species: (Steurbaut & Herman, 1978)
Genus: Dipturus Rafinesque, 1810
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Genus: Dipturus Rafinesque, 1810
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Werner, 1989
Genus: Distobatus Werner, 1989
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Brito, Veiga, Dutheil & Bergqvist, 2025
Genus: Distobatus Werner, 1989
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Delsate & Candoni, 2001
Genus: Doliobatis Delsate & Candoni, 2001
Family: Rhinobatidae Bonaparte, 1835
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Climatius latispinosus, Diplodus problematicus, Doliodus problematicus
Original description species: (Whiteaves, 1881)
Genus: Doliodus Traquair, 1893
Family: Omalodontidae Ginter, Liao, & Valenzuela-Ríos, 2008
Order: Omalodontiformes
Subclass: Elasmobranchii

Original description species: Schmid, 1861
Genus: Doratodus Schmid, 1861
Subclass: Elasmobranchii

Original description species: Underwood & Ward, 2004
Genus: Dorsetoscyllium Underwood & Ward, 2004
Family: incert. fam.
Order: Orectolobiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Bracheria wallernensis, Bracheria wallerniensis
Original description species: Pollerspöck & Straube, 2021
Genus: Dracipinna Pollerspöck & Straube, 2022
Family: Dalatiidae Gray, 1851
Order: Squaliformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Hodnett, Grogan, Lund, Lucas, Suazo, Elliott & Pruitt, 2021
Genus: Dracopristis Hodnett, Grogan, Lund, Lucas, Suazo, Elliott & Pruitt, 2021
Family: incert. fam.
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: Averianov, 1991
Genus: Dubasodus Averianov, 1991
Family: Edaphodontidae Owen, 1846
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Popov, 2003
Genus: Duffinodus Popov, 2003
Family: Callorhinchidae Garman, 1901
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Polyacrodus holwellensis
Original description species: (Duffin, 1998)
Genus: Duffinselache Andreev & Cuny, 2012
Family: incert. fam.
Order: incert. sedis
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Stumpf, Etches, Underwood & Kriwet, 2021
Genus: Durnonovariaodus Stumpf, Etches, Underwood & Kriwet, 2021
Family: Hybodontidae Owen, 1846
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Cappetta, 1991
Genus: Duwibatis Cappetta, 1991
Family: incert. fam.
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Pseudoisurus siversoni
Original description species: (Zhelezko, 2000)
Genus: Dwardius Siverson, 1999
Family: incert. fam.
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Underwood, Goswami, Prasad, Verma & Flynn, 2011
Genus: Dwardius Siverson, 1999
Family: incert. fam.
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Cretolamna woodwardi, Cretoxyrhina woodwardi, Dwardius aff. woodwardi
Original description species: (Herman, 1977)
Genus: Dwardius Siverson, 1999
Family: incert. fam.
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Original description species: Oelofsen, 1986
Genus: Dwykaselachus Oelofsen, 1986
Family: incert. fam.
Order: incert. sedis
Subclass: Elasmobranchii

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