Apatornis Marsh, 1873 † (original description)
Brontotherium Marsh, 1873 † accepted as Megacerops Leidy, 1870 † (original description)
Colonoceras Marsh, 1873 † (original description)
Diplichnites Dawson, 1873 (original description)
Pleurotomella Verrill, 1872 (original description)
Rabdichnites Dawson, 1873 † (original description)
Samythella Verrill, 1873 (original description)
Tillotherium Marsh, 1873 † accepted as Trogosus Leidy, 1871 † (original description)