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