Classification of the family Symmoriidae

Fm. †Symmoriidae Dean 1909
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G. †Cobelodus Zangerl 1973
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†Cobelodus knightianus Cope 1891
G. †Danaea Pruvost 1922
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†Danaea meccaensis Williams 1985
G. †Gutturensis Sequeira and Coates 2000
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†Gutturensis neilsoni Traquair 1898
G. †Petrodus McCoy 1848
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†Petrodus acutus Newberry and Worthen 1866
†Petrodus patelliformis McCoy 1848
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Invalid names: Petrodus buttersi Newberry 1889 [synonym], Petrodus occidentalis Newberry and Worthen 1866 [synonym]
†Petrodus pustulosus Newberry and Worthen 1870
G. †Stethacanthulus Zangerl 1990
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†Stethacanthulus meccaensis Williams 1985
G. †Stethacanthus Newberry 1889
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†Stethacanthus altonensis St. John and Worthen 1875
†Stethacanthus compressus Newberry 1897
†Stethacanthus concavus Ginter 2018
†Stethacanthus depressus Stjohn and Worthen 1875
†Stethacanthus erectus Eastman 1903
†Stethacanthus exilis Hussakof 1913
†Stethacanthus gansuensis Wang et al. 2004
†Stethacanthus humilis Hussakof 1913
†Stethacanthus praecursor Hussakof and Bryant 1918
†Stethacanthus productus Newberry 1897
†Stethacanthus tumidus Newberry 1889
Invalid names: Cladodus hibberti Agassiz 1843 [nomen dubium], Pinegocaptus Minikh 2006 [synonym]
G. †Symmorium Cope 1893
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†Symmorium reniforme Cope 1893
Invalid names: Stethacanthidae Lund 1974 [synonym]