Wa
Wakea Glaw and Vences, 2006; (1 sp.)
- Wakea madinika (Vences, Andreone, Glaw, and Mattioli, 2002)
Amphibia → Anura → Mantellidae → Mantellinae
†Wantzosaurus Lehman, 1961
- †Wantzosaurus elongatus Lehman 1961
Amphibia → Temnospondyli → Trematosauria → Trematosauroidea → Trematosauridae → Lonchorhynchinae
†Watsonisuchus Ochev, 1966
- †Watsonisuchus aliciae (Warren & Hutchinson, 1988) Damiani, 2001
- †Watsonisuchus gunganj (Warren, 1980) Steyer, 2003
- †Watsonisuchus magnus (Watson, 1962) Ochev, 1966
- †Watsonisuchus rewanensis Warren 1980
- †Watsonisuchus madagascariensis (Lehman, 1961) Steyer, 2003
Amphibia → Temnospondyli → Stereospondylomorpha → Stereospondyli → Capitosauria
We
†Wellesaurus Lehman 1971
- †Wellesaurus peabodyi Welles and Cosgriff 1965
Amphibia → Temnospondyli → Stereospondyli → Capitosauria → Mastodonsauroidea → Mastodonsauridae
Werneria Poche, 1903 (6 sp.)
- Werneria bambutensis (Amiet, 1972)
- Werneria iboundji Rödel, Schmitz, Pauwels, and Böhme, 2004
- Werneria mertensiana Amiet, 1976
- Werneria preussi (Matschie, 1893)
- Werneria submontana Rödel, Schmitz, Pauwels, and Böhme, 2004
- Werneria tandyi (Amiet, 1972)
†Wetlugasaurus Riabinin, 1930
- †Wetlugasaurus angustifrons Riabinin, 1930
- †Wetlugasaurus malachovi Novikov, 1990
- †Wetlugasaurus samarensis Sennikov, 1981
Amphibia → Temnospondyli → Capitosauria
Wo
Wolterstorffina Mertens, 1939 (3 sp.)
- Wolterstorffina chirioi Boistel and Amiet, 2001
- Wolterstorffina mirei (Perret, 1971)
- Wolterstorffina parvipalmata (Werner, 1898)