Classification of Krause 1977
G. †Neoplagiaulax Lemoine 1882
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†Neoplagiaulax hazeni Jepsen 1940
†Neoplagiaulax hunteri Simpson 1936
G. †Ptilodus Cope 1881
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†Ptilodus douglassi Simpson 1935
†Ptilodus kummae Krause 1977