Classification of Troxell 1922

Subor. †Ceratomorpha Wood 1937
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G. †Dilophodon Scott 1883
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†Dilophodon minusculus Scott 1883
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]