Diana Clessin, 1878 † accepted as Dianella Gude, 1913 † (original description)
Megalobulimus K. Miller, 1878 (original description)
Mortonoceras Clessin, 1878 † accepted as Mortoniceras Meek, 1876 † (original description)
Ophyogyra Miller, 1878 (original description)
Placentceras Clessin, 1878 † (original description)
Pompholix Clessin, 1878 (original description)
Prionocylus Clessin, 1878 † accepted as Prionocyclus Meek, 1871 † (original description)
Psadara Miller, 1878 (original description)
Psylomya Clessin, 1878 † accepted as Psilomya Meek, 1876 † (original description)
Rufina Clessin, 1878 (original description)
Stimpsonia Clessin, 1878 (original description)
Syncyclomena Clessin, 1878 † (original description)