'Cotylops speciosa is a subjective synonym of Merycoidodon culbertsoni' according to E. Douglass 1906
'Cotylops is a subjective synonym of Merycoidodon' according to E. Douglass 1906
'Eucrotaphus jacksoni belongs to Eucrotaphus' according to E. Douglass 1906
'Merychyus elegans belongs to Merychyus' according to E. Douglass 1906
'Merycochoerus proprius belongs to Merycochoerus' according to E. Douglass 1906
'Merycoidodon culbertsonii is corrected as Merycoidodon culbertsoni and belongs to Merycoidodon' according to E. Douglass 1906
'Mesoreodon chelonyx belongs to Mesoreodon' according to E. Douglass 1906
'Oreodon occidentalis is recombined as Eporeodon occidentalis' according to E. Douglass 1906
'Oreodon superbus is recombined as Promerycochoerus superbus' according to E. Douglass 1906
'Oreodon is a subjective synonym of Merycoidodon' according to E. Douglass 1906
'Ticholeptus zygomaticus belongs to Ticholeptus' according to E. Douglass 1906