Classification of the family Janassidae
Fm. †Janassidae Jaekel 1899
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G. †Cholodus John and Worthen 1875
G. †Ctenopetalus Agassiz 1837
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†Ctenopetalus bellulus Saint John and Worthen 1875
†Ctenopetalus limatulus Saint John and Worthen 1875
†Ctenopetalus medius Saint John and Worthen 1875
†Ctenopetalus vinosus Saint John and Worthen 1875
G. †Dactylodus
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†Dactylodus excavatus Saint John and Worthen 1866
†Dactylodus princeps Newberry and Worthen 1866
G. †Fissodus St. John and Worthen 1875
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Fissodus bifidus Saint John and Worthen 1875
†Fissodus dentatus Eastman 1903
†Fissodus inaequalis Stjohn and Worthen 1875
G. †Gamphacanthus Miller 1892
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†Gamphacanthus politus Newberry 1889
†Gamphacanthus uddeni Lindahl 1897
G. †Gomphacanthus Davis 1884
G. †Janassa
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†Janassa angularis Branson 1916
†Janassa bituminosa Schlotheim 1820
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Invalid names: Acrodus larva Agassiz 1839 [synonym], Byzenos latipinnatus Münster 1843 [synonym], Dictea striata Münster 1840 [synonym], Janassa angulata Münster 1839 [synonym], Janassa dictea Münster 1842 [synonym], Janassa humboldii Münster 1839 [synonym]
†Janassa brevis Newberry 1856
†Janassa clarki Lund 1989
†Janassa clavatus M'Coy 1848
†Janassa gurleiana Cope 1877
†Janassa imbricatus M'Coy 1848
†Janassa kochi Nielsen 1932
†Janassa korni Weigelt 1930
†Janassa linguaeformis Atthey 1868
†Janassa maxima Eastman 1903
†Janassa ordiana Cope 1881
†Janassa strigilina Cope 1881
†Janassa unguicula Eastman 1903
Invalid names: Byzenos Münster 1843 [synonym], Climaxodus McCoy 1848 [synonym], Dictea Münster 1840 [synonym]
G. †Petalodopsis Barkas 1874
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†Petalodopsis mirabilis Barkas 1874
†Petalodopsis tripartitis Davis 1833
G. †Phoderacanthus Davis 1883
G. †Platacanthus M'Coy 1848
G. †Pnigeacanthus St John and Worthen 1883
G. †Stichacanthus Koninck 1878
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†Stichacanthus coemansi Koninck 1878
†Stichacanthus tortworthensis Davis 1883