- Waematau kaitaia Duncan, 1994
- Waematau manawatahi Duncan, 1994
- Waematau muriwhena Duncan, 1994
- Waematau reinga Duncan, 1994
- Waematau unuwhao Duncan, 1994
Animalia → Arthropoda → Malacostraca → Amphipoda → Talitroidea → Talitridae
- Wahrbergia
- Waiparacythereis
- Waitangi
- Waiteolana gibbera Harrison, 1984
- Waiteolana rugosa Baker, 1926
- Waiteolana tuberculata Kussakin, 1967
Crustacea → Malacostraca → Isopoda → Sphaeromatoidea → Sphaeromatidae
- Waitomo
- Waldola
- Waldotheres
- Waltoncythere
- Wandelia
- Watlingia cassis Gerken, 2010 tipična
- Watlingia chathamensis Gerken, 2010
Crustacea → Malacostraca → Peracarida → Cumacea → Lampropidae
- Weltneria aapta Tomlinson, 1969
- Weltneria bekae Kolbasov, 2001
- Weltneria exargilla Newman, 1974
- Weltneria griggi Grygier & Newman, 1985
- Weltneria hessleri Newman, 1971
- Weltneria hirsuta Tomlinson, 1963
- Weltneria ligamenta Grygier & Newman, 1985
- Weltneria reticulata Tomlinson, 1969
- Weltneria spinosa Berndt, 1907
- Weltneria tomlinsoni Zevina, 1991
- Weltneria zibrowii Turquier, 1985
Crustacea → Multicrustacea → Lithoglyptida → Lithoglyptidae
- Whangarusa
- Whiteleggia
- Whiteleggiidae
- Whoia
- Wichmannella
- Wildus
- Willemoesia
- Williamstimpsonia
- Wimvadocus torelli (Goës, 1866)
Crustacea → Malacostraca → Amphipoda → Hadziidira → Hadzioidea → Maeridae
- Wlassicsia kinistinensis Birge, 1910 [1]
- Wlassicsia pannonica Daday, 1904[2]
Crustacea → Branchiopoda → Diplostraca → Cladocera → Anomopoda → Macrothricidae
Animalia → Arthropoda → Ostracoda
- Wutingella binodosa Zhang, 1974
Animalia → Arthropoda → Ostracoda