WDiscidae
WAnguispira
WAnguispira alternata
WAnguispira cumberlandiana
WAnguispira kochi
WDiscus (gastropod)
WDiscus catskillensis
WDiscus engonatus
WDiscus macclintocki
WDiscus perspectivus
WDiscus rotundatus
WDiscus ruderatus
WPainted snake-coiled forest snail