Bulimus limneaformis Meek & Hayden, 1856 † accepted as Lioplacodes limneaformis (Meek & Hayden, 1856) † (original description)
Bulimus nebrascensis Meek & Hayden, 1856 † accepted as Campeloma nebrascense (Meek & Hayden, 1856) † (original description)
Bulimus teres Meek & Hayden, 1856 † accepted as Pseudocolumna haydeniana (T. D. A. Cockerell, 1906) † (original description)
Bulimus vermiculus Meek & Hayden, 1856 † accepted as Pseudocolumna vermicula (Meek & Hayden, 1856) † (original description)
Cyclas formosa Meek & Hayden, 1856 † accepted as Eupera formosa (Meek & Hayden, 1856) † (original description)
Cyclas fragilis Meek & Hayden, 1856 † accepted as Eupera formosa (Meek & Hayden, 1856) † (original description)
Cyclas subellipticus Meek & Hayden, 1856 † accepted as Sphaerium subellipticum (Meek & Hayden, 1856) † (original description)
Cyrena intermedea Meek & Hayden, 1856 † accepted as Corbicula intermedea (Meek & Hayden, 1856) † (original description)
Cyrena moreauensis Meek & Hayden, 1856 † accepted as Corbicula subelliptica moreauensis (Meek & Hayden, 1856) † (original description)
Cyrena occidentalis Meek & Hayden, 1856 † accepted as Veloritina occidentalis (Meek & Hayden, 1856) † (original description)
Limnaea tenuicosta Meek & Hayden, 1856 † accepted as Pleurolimnaea tenuicosta (Meek & Hayden, 1856) † (original description)
Melania anthonyi Meek & Hayden, 1856 † accepted as Hydrobia anthonyi (Meek & Hayden, 1856) † (original description)
Melania convexa Meek & Hayden, 1856 † accepted as Goniobasis convexa (Meek & Hayden, 1856) † (original description)
Melania minutula Meek & Hayden, 1856 † accepted as Micropyrgus minutulus (Meek & Hayden, 1856) † (original description)
Melania multistriata Meek & Hayden, 1856 † accepted as Lioplacodes multistriata (Meek & Hayden, 1856) † (original description)
Melania nebrascensis Meek & Hayden, 1856 † accepted as Lioplacodes nebrascensis (Meek & Hayden, 1856) † (original description)
Paludina conradi Meek & Hayden, 1856 † accepted as Viviparus conradi (Meek & Hayden, 1856) † (original description)
Paludina leai Meek & Hayden, 1856 † accepted as Viviparus leai (Meek & Hayden, 1856) † (original description)
Paludina leidyi Meek & Hayden, 1856 † accepted as Viviparus leidyi (Meek & Hayden, 1856) † (original description)
Paludina multilineata Meek & Hayden, 1856 † accepted as Campeloma nebrascense nebrascense (Meek & Hayden, 1856) † (original description)
Paludina peculiaris Meek & Hayden, 1856 † accepted as Viviparus peculiaris (Meek & Hayden, 1856) † (original description)
Paludina retusa Meek & Hayden, 1856 † accepted as Bellamya retusa (Meek & Hayden, 1856) † (original description)
Paludina trochiformis Meek & Hayden, 1856 † accepted as Viviparus meeki Wenz, 1930 † (original description)
Paludina vetula Meek & Hayden, 1856 † accepted as Campeloma vetulum (Meek & Hayden, 1856) † (original description)
Physa longiuscula Meek & Hayden, 1856 † (original description)
Physa nebrascensis Meek & Hayden, 1856 † (original description)
Physa rhomboidea Meek & Hayden, 1856 † (original description)
Physa subelongata Meek & Hayden, 1856 † accepted as Aplexa subelongata (Meek & Hayden, 1856) † (original description)
Planorbis convolutus Meek & Hayden, 1856 † accepted as Biomphalaria convoluta (Meek & Hayden, 1856) † (original description)
Planorbis subumbilicata Meek & Hayden, 1856 † accepted as Valvata subumbilicata (Meek & Hayden, 1856) † (original description)
Pupa helicoides Meek & Hayden, 1856 † (original description)
Unio priscus Meek & Hayden, 1856 † accepted as Plesielliptio priscus (Meek & Hayden, 1856) † (original description)
Valvata parvula Meek & Hayden, 1856 † accepted as Gyraulus parvulus (Meek & Hayden, 1856) † (original description)
Velletia (Ancylus) minuta Meek & Hayden, 1856 † accepted as Acroloxus minutus (Meek & Hayden, 1856) † (original description)