Protoceras
Synthetoceras
(tree size 1)
Paratoceras
(tree size 3)
Syndyoceras
(tree size 1)
Heteromeryx
(tree size 1)
Leptoreodon
Leptotragulus
Poabromylus
Prosynthetoceras
Pseudoprotoceras
(tree size 1)
Synthetoceratinae
(tree size 5)
Toromeryx
Trigenicus
Protoceratinae