Buccinofusus Conrad, 1866 † (original description)
Buccinofusus diegoensis (Gabb, 1864) † (new combination reference)
Camptonectes claibornensis Conrad, 1866 † accepted as
Eburneopecten scintillatus (Conrad, 1865) † (original description (unavailable nomenclaturally))
Limnaea nitidula (Meek, 1860) † accepted as
Lymnaea nitidula (Meek, 1860) † (basis of record)
Micromeris Conrad, 1866 (original description)
Micropyrgus Meek, 1866 † (original description)
Pleurolimnaea Meek, 1866 † (original description)
Spiraxis haydeni Conrad, 1866 † accepted as
Lioplacodes limneaformis (Meek & Hayden, 1856) † (original description)