Classification of the subfamily Protolabinae
Subfm. †Protolabinae Zittel 1893
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G. †Michenia Frick and Taylor 1971
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†Michenia agatensis Frick and Taylor 1971
†Michenia deschutensis Dingus 1990
†Michenia exilis Matthew and Macdonald 1960
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Invalid names: Michenia australis Stevens 1977 [synonym]
†Michenia mudhillsensis Pagnac 2005
G. †Protolabis Cope 1876
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†Protolabis angustidens Cope 1874
†Protolabis barstowensis Lewis 1968
†Protolabis gracilis Leidy 1858
†Protolabis inaequidens Cope and Matthew 1915
†Protolabis saxeus Matthew 1924
†Protolabis yavapaiensis Honey and Taylor 1978
G. †Tanymykter Honey and Taylor 1978
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†Tanymykter brachyodontus Peterson 1904
†Tanymykter longirostris Peterson 1911