WAlasmidonta viridis
WCracking pearlymussel
WEllipsaria lineolata
WEpioblasma flexuosa
WEpioblasma triquetra
WFanshell
WIschadium
WLampsilis cardium
WLampsilis fasciola
WLeptodea fragilis
WLeptodea leptodon
WObliquaria reflexa
WObovaria subrotunda
WPlethobasus cyphyus
WPleurobema cordatum
WPleurobema rubrum
WPotamilus ohiensis
WPtychobranchus fasciolaris
WRotundaria tuberculata
WTheliderma metanevra