Géneros de hongos: Wadeana [4 taxones], Waitea [5 taxones], Waldemaria [1 taxon], Walkeromyces [1 taxon], Wallemia [4 taxones], Wallrothiella [16 taxones], Waltonia [8 taxones], Wardina [3 taxones], Wardinella [1 taxon], Wardomyces [1 taxon], Wawelia [2 taxones], Waydora [19 taxones], Weissia [4 taxones], Wentiomyces [15 taxones], Westerdykella [4 taxones], Wettsteinina [25 taxones], Weufia [4 taxones], Wiesneriomyces [90 taxones], Winterella [52 taxones], Winteria [1 taxon], Winteria [2 taxones], Winterina [2 taxones], Wojnowicia [20 taxones], Wolfiporia [13 taxones], Woodiella [3 taxones], Woronina [8 taxones], Woroninella [4 taxones], Wrightoporia [15 taxones], Wuestneia [3 taxones], Wynnea [2 taxones]