Acoelodus Ameghino, 1897 † (original description)
Anastylops Ameghino, 1897 † accepted as Notostylops Ameghino, 1897 † (original description)
Archaeolophus Ameghino, 1897 † accepted as Carolozittelia Ameghino, 1901 † (original description)
Argyrohyrax Ameghino, 1897 † accepted as Plagiarthrus Ameghino, 1896 † (original description)
Asteromys Ameghino, 1897 † (original description)
Cephalomys Ameghino, 1897 † (original description)
Eupithecops Ameghino, 1897 † (original description)
Eutrachytherus Ameghino, 1897 † accepted as Trachytherus Ameghino, 1889 † (original description)
Glyptatelus Ameghino, 1897 † (original description)
Lambdaconus Ameghino, 1897 † (original description)
Lambdoconus Ameghino, 1897 † accepted as Lambdaconus Ameghino, 1897 † (original description)
Morphippus Ameghino, 1897 † (original description)
Orchiomys Ameghino, 1897 † accepted as Cephalomys Ameghino, 1897 † (original description)
Pachypithecus Ameghino, 1897 † (original description)
Parastylops Ameghino, 1897 † accepted as Pleurostylodon Ameghino, 1897 † (original description)
Pleurostylodon Ameghino, 1897 † (original description)
Proadiantus Ameghino, 1897 † (original description)
Proborhyaena Ameghino, 1897 † (original description)
Prohegetotherium Ameghino, 1897 † (original description)
Properiptychus Ameghino, 1897 † (original description)
Prostylops Ameghino, 1897 † accepted as Isotemnus Ameghino, 1897 † (original description)
Protheosodon Ameghino, 1897 † (original description)