Classification of Carroll et al. 1998
Unr. †Lepospondyli von Zittel 1887
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Fm. †Acherontiscidae Carroll 1967
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Or. †Aistopoda Miall 1875
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Fm. †Ophiderpetontidae Schwarz 1908
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G. †Ophiderpeton Huxley 1866
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†Ophiderpeton brownriggi Wright and Huxley 1871
†Ophiderpeton granulosum Fritsch 1880
†Ophiderpeton kirktonense Milner 1994
†Ophiderpeton nanum Hancock and Atthey 1868
†Ophiderpeton swisshelmense Thayer 1985
†Ophiderpeton vicinum Fritsch 1880
Fm. †Phlegethontiidae Cope 1875
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G. †Phlegethontia Cope 1871
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†Phlegethontia linearis Cope 1871
†Phlegethontia longissima Fritsch 1875
†Phlegethontia phanerhapha Thayer 1985
Or. †Microsauria Dawson 1863
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Subor. †Microbrachomorpha Carroll and Gaskill 1978
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Fm. †Brachystelechidae Carroll and Gaskill 1978
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Fm. †Odonterpetontidae Carroll and Gaskill 1978
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G. †Novascoticus Carroll 1966
Subor. †Tuditanomorpha Carroll and Gaskill 1978
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Fm. †Goniorhynchidae Carroll and Gaskill 1978
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Fm. †Gymnarthridae Case 1910
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G. †Cardiocephalus Broili 1904
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†Cardiocephalus peabodyi Carroll and Gaskill 1978
†Cardiocephalus sternbergi Broili 1904
G. †Euryodus Olson 1939
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†Euryodus bonneri Schultze and Foreman 1981
†Euryodus dalyae Carroll and Gaskill 1978
†Euryodus primus Olson 1939
G. †Hylerpeton Owen 1862
G. †Leiocephalikon Steen 1934
G. †Pariotichus Cope 1878
G. †Sparodus Fritsch 1876
Fm. †Ostodolepidae Romer 1945
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Fm. †Pantylidae Case 1911
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Or. †Nectridea Miall 1875
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Fm. †Diplocaulidae Cope 1881
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G. †Batrachiderpeton Hancock and Atthey 1871
G. †Diceratosaurus Jaekel 1903
G. †Diplocaulus Cope 1877
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†Diplocaulus brevirostris Olson 1951
†Diplocaulus magnicornis Cope 1882
†Diplocaulus minimus Dutuit 1988
†Diplocaulus parvus Olson 1972
†Diplocaulus recurvatus Olson 1952
†Diplocaulus salamandroides Cope 1877
Invalid names: Diplocaulus copei Broili 1904 [nomen vanum]
G. †Diploceraspis
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G. †Keraterpeton Wright and Huxley 1866
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†Keraterpeton galvani Huxley 1867
†Keraterpeton longtoni Carroll et al. 1998
Invalid names: Ceraterpeton Wright and Huxley 1866 [misspelling]
Invalid names: Keraterpetontidae Jaekel 1903 [synonym]
Fm. †Scincosauridae Jaeckel 1909
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Fm. †Urocordylidae Lydekker 1889
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Subfm. †Sauropleurinae Carroll et al. 1998
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G. †Montcellia Dutuit and Heyler 1994
G. †Sauropleura Cope 1868
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†Sauropleura bairdi Carroll et al. 1998
†Sauropleura longicaudata Langiaux et al. 1974
†Sauropleura pectinata Cope 1868
Subfm. †Urocordylinae Carroll et al. 1998
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G. †Urocordylus Wright and Huxley 1866
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†Urocordylus scalaris Fritsch 1883
†Urocordylus wandesfordii Huxley 1867
†Sauropleura remex Cope 1868
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Invalid names: Ctenerpeton alveolatum Cope 1897 [synonym]
†Erpetosaurus radiatus Cope 1874
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Invalid names: Diceratosaurus robustus Moodie 1909 [synonym]