Allotrioceras bifurcatum (FOSSIL) Flower, 1955 † USA, New York, Clinton
Cacheoceras trifidum (FOSSIL) Flower, 1968 † USA, Utah
Cacheoceras uninodum (FOSSIL) Flower, 1976 † USA, Utah
Mirabiloceras multitubulatum (FOSSIL) Flower, 1955 † USA, New York, Clinton
Williamsoceras adnatum (FOSSIL) (Flower, 1964 †) USA, Utah
Williamsoceras ankhiferum (FOSSIL) Flower, 1968 † USA, Utah
Williamsoceras compressum (FOSSIL) Flower, 1976 † USA, Utah
Williamsoceras ellipticum (FOSSIL) Flower, 1976 † USA, Utah
Williamsoceras pedunculatum (FOSSIL) Flower, 1968 † USA, Utah