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

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

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

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

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

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

Original description species: Turner, 1997
Genus: Wellerodus Turner, 1997
Family: Antarctilamnidae Ginter, Liao, & Valenzuela-Ríos, 2008
Order: Antarctilamniformes
Subclass: Elasmobranchii

Original description species: Marss, Wilson & Thorsteinsson, 2002
Genus: Wellingtonella Marss, Wilson & Thorsteinsson, 2002
Family: Wellingtonellidae Marss, Wilson & Thorsteinsson, 2002
Order: incert. sedis

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

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

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

Original description species: Saugen, Roberts, Engelschion & Hurum, 2024
Genus: Wimanodon Saugen, Roberts, Engelschion & Hurum, 2024
Family: incert. fam.
Order: Synechodontiformes
Superorder: Galeomorphii
Subcohort: Neoselachii
Cohort: Euselachii
Subclass: Elasmobranchii

Synonyms: Strophodus angustus, Strophodus arcuatus
Original description species: (Münster, 1840)
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Original description species: Maisey, 1982
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

Synonyms: Radamas macrocephalus
Original description species: Münster, 1843
Genus: Wodnika Münster, 1843
Family: Ctenacanthidae Dean, 1909
Order: Ctenacanthiformes
Superorder: Cladodontomorphi
Subclass: Elasmobranchii

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

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

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

Original description species: Richter, 2005
Genus: Wurdigneria Richter, 2005
Family: Xenacanthidae Fritsch, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: (Würdig-Maciel, 1975)
Genus: Wurdigneria Richter, 2005
Family: Xenacanthidae Fritsch, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii

Original description species: (Würdig-Maciel, 1975)
Genus: Wurdigneria Richter, 2005
Family: Xenacanthidae Fritsch, 1889
Order: Xenacanthiformes
Superorder: Xenacanthimorpha
Subclass: Elasmobranchii