Classification of Troxell 1922

Subor. †Ceratomorpha Wood 1937
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G. †Dilophodon Scott 1883
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Dilophodon minusculus Scott 1883
Dilophodon nanus Leidy 1872
G. †Helaletes Marsh 1872
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Helaletes boops Marsh 1872
Helaletes guyotii Scott 1883
Helaletes nanus Marsh 1871
Invalid names: Desmatotherium Scott 1883 [synonym]