Classification of Krishtalka and Stucky 1983

Fm. Didelphidae Gray 1821 [opossum]
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Subfm. Didelphinae Gray 1827
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Tr. Didelphini Crochet 1979
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G. †Herpetotherium Cope 1873
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†Herpetotherium fuzax Cope 1873
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Invalid names: Herpetotherium huntii Cope 1873 [synonym], Herpetotherium stevensonii Cope 1873 [synonym]
G. †Peratherium Aymard 1850
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†Peratherium comstocki Cope 1884
†Peratherium edwardi Gazin 1952
†Peratherium innominatum Simpson 1928
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Invalid names: Peratherium macgrewi Bown 1979 [synonym]
†Peratherium marsupium Troxell 1923
Invalid names: Centracodon Marsh 1872 [synonym], Entomacodon Marsh 1872 [synonym]
Tr. †Peradectini Crochet 1979
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G. †Armintodelphys Krishtalka and Stucky 1983
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†Armintodelphys blacki Krishtalka and Stucky 1983
†Armintodelphys dawsoni Krishtalka and Stucky 1983
G. †Peradectes Matthew and Granger 1921
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†Peradectes chesteri Gazin 1952
†Peradectes mcgrewi Russell 1972
†Peradectes minutus McGrew 1937
Invalid names: Nanodelphys McGrew 1937 [synonym]
G. †Thylacodon Matthew and Granger 1921
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†Thylacodon pusillus Matthew and Granger 1921
†Peratherium fugax Cope 1873
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Invalid names: Didelphys pygmaea Scott 1894 [synonym]
†Peratherium knighti McGrew et al. 1959
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Invalid names: Centracodon delicatus Marsh 1872 [synonym], Entomacodon minutus Marsh 1872 [synonym], Peratherium morrisi Gazin 1962 [synonym]