Walteraja exigua (2)
Siverson & Cappetta, 2001
Original description species: Siverson & Cappetta, 2001
Genus: Walteraja Siverson & Cappetta, 2001
Family: Rajidae De Blainville, 1816
Suborder: Rajoidei
Order: Rajiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Wapitiodus aplopagus (2)
Mutter, De Blanger & Neuman, 2007
Valid name: Homalodontus aplopagus
Valid name: Homalodontus aplopagus
Original description species: Mutter, De Blanger & Neuman, 2007
Genus: Wapitiodus Mutter, De Blanger & Neuman, 2007
Family: Homalodontidae Mutter, Neuman, & De Blanger, 2008
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Wapitiodus homalorhizo (1)
Mutter, De Blanger & Neuman, 2007
Valid name: Homalodontus homalorhizo
Valid name: Homalodontus homalorhizo
Original description species: Mutter, De Blanger & Neuman, 2007
Genus: Wapitiodus Mutter, De Blanger & Neuman, 2007
Family: Homalodontidae Mutter, Neuman, & De Blanger, 2008
Superfamily: Hybodontoidea
Order: Hybodontiformes
Cohort: Euselachii
Subclass: Elasmobranchii
Washakiebatis kirklandi (1)
Zeigler, Lucas & Heckert, 2005
Original description species: Zeigler, Lucas & Heckert, 2005
Genus: Washakiebatis Zeigler, Lucas & Heckert, 2005
Family: Rhombodontidae Cappetta, 1987
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Weissobatis micklichi (4)
Hovestadt & Hovestadt-Euler, 1999
Original description species: Hovestadt & Hovestadt-Euler, 1999
Genus: Weissobatis Hovestadt & Hovestadt-Euler, 1999
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Weissobatis sp. (1)

Genus: Weissobatis Hovestadt & Hovestadt-Euler, 1999
Family: Myliobatidae Bonaparte, 1838
Order: Myliobatiformes
Superorder: Batomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Welcommia bodeuri (5)
Cappetta, 1990
Original description species: Cappetta, 1990
Genus: Welcommia Cappetta, 1990
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Welcommia cappettai (1)
Klug & Kriwet, 2010
Original description species: Klug & Kriwet, 2010
Genus: Welcommia Cappetta, 1990
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Welcommia sp. (1)

Genus: Welcommia Cappetta, 1990
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Welcommia terencei (1)
Delsate & Godefroit, 1995
Original description species: Delsate & Godefroit, 1995
Genus: Welcommia Cappetta, 1990
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Wellerodus priscus (9)
(Eastman, 1899)
Synonyms: Diplodus cf. priscus, Diplodus priscus, Dittodus priscus
Original description species: (Eastman, 1899)
Genus: Wellerodus Turner, 1997
Family: Antarctilamnidae Ginter, Liao, & Valenzuela-Ríos, 2008
Order: Antarctilamniformes
Subclass: Elasmobranchii
Wellerodus sp. (2)

Genus: Wellerodus Turner, 1997
Family: Antarctilamnidae Ginter, Liao, & Valenzuela-Ríos, 2008
Order: Antarctilamniformes
Subclass: Elasmobranchii
Wellerodus wellsi (1)
Turner, 1997
Original description species: Turner, 1997
Genus: Wellerodus Turner, 1997
Family: Antarctilamnidae Ginter, Liao, & Valenzuela-Ríos, 2008
Order: Antarctilamniformes
Subclass: Elasmobranchii
Weltonia ancistrodon (4)
(Arambourg, 1952)
Synonyms: Heptranchias cf. ancistrodon, Notidanus (Heptranchias) ancistrodon
Original description species: (Arambourg, 1952)
Genus: Weltonia Ward, 1979
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Weltonia burnhamensis (6)
Ward, 1979
Original description species: Ward, 1979
Genus: Weltonia Ward, 1979
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Weltonia sp. (2)

Genus: Weltonia Ward, 1979
Family: Hexanchidae Gray, 1851
Suborder: Hexanchoidei
Order: Hexanchiformes
Superorder: Squalomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Whitropus longicalcus (1)
Richards, Sherwin, Smithson, Bennion, Davies, Marshall & Clack, 2018
Original description species: Richards, Sherwin, Smithson, Bennion, Davies, Marshall & Clack, 2018
Genus: Whitropus Richards, Sherwin, Smithson, Bennion, Davies, Marshall & Clack, 2018
Family: incert. fam.
Order: Cochliodontiformes
Superorder: Holocephalimorpha
Subclass: Holocephali
Williamsella sp. (1)

Genus: Williamsella Gunnell, 1933
Williamsella striata (1)
Gunnell, 1933
Original description species: Gunnell, 1933
Genus: Williamsella Gunnell, 1933
Williamsella typicalis (1)
Gunnell, 1933
Original description species: Gunnell, 1933
Genus: Williamsella Gunnell, 1933
Wodnika althausi (5)
Münster, 1840
Synonyms: Strophodus angustus, Strophodus arcuatus
Original description species: Münster, 1840
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii
Wodnika borealis (1)
Maisey, 1982
Original description species: Maisey, 1982
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii
Wodnika ocoyce (1)
Jordan & Gilbert, 1919
Original description species: Jordan & Gilbert, 1919
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii
Wodnika sp. (2)

Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii
Wodnika striatula (11)
Münster, 1843
Synonyms: Radamas macrocephalus
Original description species: Münster, 1843
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii
Woellsteinia kozlovi (5)
Adnet, 2006
Original description species: Adnet, 2006
Genus: Woellsteinia Reinecke, Stapf & Raisch, 2001
Family: Mitsukurinidae Jordan, 1898
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Woellsteinia oligocaena (3)
Reinecke, Stapf & Raisch, 2001
Original description species: Reinecke, Stapf & Raisch, 2001
Genus: Woellsteinia Reinecke, Stapf & Raisch, 2001
Family: Mitsukurinidae Jordan, 1898
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Woellsteinia palatasi (3)
(Kozlov, 2001)
Synonyms: Anomotodon palatasi
Original description species: (Kozlov, 2001)
Genus: Woellsteinia Reinecke, Stapf & Raisch, 2001
Family: Mitsukurinidae Jordan, 1898
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Woellsteinia sp. (2)

Genus: Woellsteinia Reinecke, Stapf & Raisch, 2001
Family: Mitsukurinidae Jordan, 1898
Order: Lamniformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii
Wurdigneria obliterata (2)
Richter, 2005
Original description species: Richter, 2005
Genus: Wurdigneria Richter, 2005
Family: Xenacanthidae Fritsch, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Wurdigneria pricei (1)
(Würdig-Maciel, 1975)
Original description species: (Würdig-Maciel, 1975)
Genus: Wurdigneria Richter, 2005
Family: Xenacanthidae Fritsch, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Wurdigneria santosi (1)
(Würdig-Maciel, 1975)
Original description species: (Würdig-Maciel, 1975)
Genus: Wurdigneria Richter, 2005
Family: Xenacanthidae Fritsch, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii
Wuxuanichthys sp. (1)

Genus: Wuxuanichthys Wang, 1992
Subclass: Elasmobranchii
Wuxuanichthys watngi (1)
Wang, 1992
Original description species: Wang, 1992
Genus: Wuxuanichthys Wang, 1992
Subclass: Elasmobranchii