Classification of Zonneveld et al. 2000

G. †Baena Leidy 1870
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†Baena arenosa Leidy 1870
G. †Anosteira Leidy 1871
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†Anosteira ornata Leidy 1871
G. †Echmatemys Hay 1906
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†Echmatemys septaria Cope 1873
G. Emys Dumeril 1806 [pond turtle]
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†Emys wyomingensis Leidy 1870
G. †Parasauromalus Gilmore 1928
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†Parasauromalus olseni Gilmore 1928
G. †Glyptosaurus Marsh 1871
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G. †Xestops Cope 1873
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†Xestops vagans Marsh 1872
G. †Calamagras Cope 1873
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†Calamagras primus Hecht 1959
G. Crocodylus Laurenti 1768 [crocodile]
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†Crocodylus affinis Marsh 1871
G. †Pristichampsus Gervais 1853
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†Pristichampsus vorax Troxell 1925
G. †Scenopagus McKenna and Simpson 1959
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†Scenopagus curtidens Matthew 1909
†Paramys copei Loomis 1907
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Invalid names: Paramys bicuspis Loomis 1907 [synonym]