Wabarra
Waddlia
Wadicosa
Wadilemur elegans(EXTINCT)
Wadotes
Wahlbergiana
Wahydra
W-bella
W-dores
W-kenava
W-nieblensis
W-obscura
W-subhebetis
W-tassa
W-thisbe
W-vola
Waitatia
Waitetola
Walangania(EXTINCT)
Walesia
Wallemiomycetes(incertae sedis)
Wallengrenia
W-egeremet
W-otho
W-premnas
WalvisteuthisNesis and Nikitina 1986
Warburgia
Warrumbungle
Washpool
Wasmannellus
Wasmannia
W-affinis
W-auropunctata
W-iheringi
W-lutzi
W-rochai
W-scrobifera
W-sigmoidea
W-sulcaticeps
W-villosa
W-williamsoni
Wasmannina
Wasmannister
Wataranka
WataseniaIshikawa 1914
Wechselia
Weeksella
Weigela(monophyly uncertain)
Weinbergina(EXTINCT)
Weineria
Weiratheria
Weiria
Weissella
Weissflogia
Wellsia(EXTINCT)
Wellsiana(EXTINCT)
Wellsotrochus(EXTINCT)
Welwitschia mirabilis
Wendilgarda
Wenyingia
Werneckiella
Werneria
Wesenbergia
Wesmaelius
West African lineage(incertae sedis)
Westerdykella
Western Hemisphere Loxandrus(non-monophyletic)
Western Palearctic water frogs
Westlothiana(EXTINCT)
Whalleyana
Whangareiella
Whatcheeria(EXTINCT)
Whitea
Whitfieldieae
Whyanbeel
Wiangaree
Wiedomyini
Wiedomys
Wierzejskiella
Wigrella
Wilfredomys
Williamsia
Willwerathia(EXTINCT) (incertae sedis)
Windia windi
Winteraceae
Wiseana
W-cervinata
W-copularis
W-fuliginea
W-jocosa
W-mimica
W-signata
W-umbraculatus
Wisteria
Witelsus
Woldenka
Wolga
Wollomombi
Wolltinerfia
Wolterstorffiella wiggeri(EXTINCT)0(incertae sedis)
Wolterstorffina
Woodenbong
Woodwardopteridae(EXTINCT)
World wide
Wroughtonilla
Wulfertia
Wurthiinae