Classification of Vlachos 2018
Subor. Cryptodira Cope 1868
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Unr. †Pantestudinoidea Joyce et al. 2004
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Superfm. Testudinoidea Gray 1825
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Unr. †Panemydidae Joyce et al. 2004
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Fm. Emydidae Rafinesque 1815
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G. Chrysemys Gray 1844 [painted turtle]
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†Chrysemys platymarginata Weaver and Robertson 1967
†Chrysemys timida Hay 1908
G. Emydoidea Gray 1870 [Blanding's turtle]
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Emydoidea blandingii Holbrook 1838 [Blanding's turtle]
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Invalid names: Emys twentei Taylor 1943 [synonym]
G. Emys Dumeril 1806 [pond turtle]
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Emys marmorata Baird and Girard 1852 [western pond turtle]
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Invalid names: Clemmys owyheensis Brattstrom and Sturn 1959 [synonym]
†Emys wyomingensis Leidy 1870
G. Pseudemys Gray 1856 [cooter]
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†Pseudemys carri Rose and Weaver 1966
†Pseudemys idahoensis Gilmore 1933
†Pseudemys williamsi Rose and Weaver 1966
G. Terrapene Merrem 1820 [box turtle]
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Terrapene carolina Linnaeus 1758 [common box turtle]
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Invalid names: Terrapene innoxia Hay 1916 [synonym]
†Terrapene corneri Holman and Fritz 2005
Terrapene ornata Agassiz 1857 [Western box turtle]
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Invalid names: Terrapene longinsulae Hay 1909 [synonym], Terrapene whitneyi Hay 1916 [synonym]
†Terrapene parornata Joyce et al. 2012
†Terrapene putnami Hay 1906 [box turtle]
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Invalid names: Terrapene antipex Hay 1916 [synonym], Terrapene canaliculata Hay 1907 [synonym], Terrapene llanensis Oelrich 1953 [synonym]
†Terrapene singletoni Gilmore 1927
Invalid names: Cistudo marnochii Cope 1877 [nomen dubium], Terrapene bulverda Hay 1920 [nomen dubium], Terrapene hibernaculum Kuhn 1964 [nomen nudum], Terrapene impressa Hay 1924 [nomen dubium]
G. Trachemys Agassiz 1857 [slider]
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†Trachemys antiqua Clark 1937
†Trachemys sculpta Hay 1908
Invalid names: Trachemys jarmani Hay 1908 [nomen dubium], Trachemys trulla Hay 1908 [nomen dubium]
Invalid names: Chrysemys inflata Weaver and Robertson 1967 [nomen dubium], Chrysemys isoni Weems and George 2001 [nomen dubium], Chrysemys limnodytes Galbreath 1948 [nomen dubium], Clemmys hutchensorum Bourque 2016 [nomen dubium], Clemmys saxea Hay 1903 [nomen dubium], Deirochelys floridana Hay 1908 [nomen dubium], Emydoidea hutchisoni Holman 1995 [nomen dubium], Pseudemys bisornatus Cope 1877 [nomen dubium], Pseudemys caelata Hay 1908 [nomen dubium], Pseudemys extincta Hay 1908 [nomen dubium], Pseudemys hillii Cope 1878 [nomen dubium]
Unr. †Pangeoemydidae Joyce 2007
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Fm. Geoemydidae Theobald 1868
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G. †Bridgeremys Hutchison 2006
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G. †Echmatemys Hay 1906
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†Echmatemys arethusa Hay 1908
†Echmatemys callopyge Hay 1908
†Echmatemys cibollensis Cope 1877
†Echmatemys haydeni Leidy 1870
†Echmatemys jeanesi Leidy 1870
†Echmatemys lativertebralis Cope 1877
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Invalid names: Chrysemys inornata Loomis 1904 [synonym], Echmatemys douglassi Gilmore 1915 [synonym], Echmatemys hollandi Gilmore 1915 [synonym], Echmatemys rivalis Hay 1909 [synonym], Emys shaughnessiana Cope 1882 [synonym], Graptemys cordifera Clark 1937 [synonym]
†Echmatemys stevensoniana Leidy 1870
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Invalid names: Echmatemys aegle Hay 1908 [synonym], Echmatemys cyane Hay 1908 [synonym], Echmatemys ocyrrhoe Hay 1908 [synonym], Emys septarius Cope 1873 [synonym]
Invalid names: Echmatemys depressa Gilmore 1915 [nomen dubium], Palaeotheca polycypha Cope 1872 [nomen dubium], Palaeotheca terrestris Cope 1872 [nomen dubium]
Unr. †Pantestudinidae Joyce et al. 2004
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G. †Cymatholcus Clark 1932
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G. †Hadrianus Cope 1872
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†Hadrianus corsoni Leidy 1871
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Invalid names: Emys carteri Leidy 1871 [synonym], Hadrianus octonarius Cope 1871 [synonym], Hadrianus robustus Gilmore 1915 [synonym], Hadrianus tumidus Hay 1908 [synonym], Hadrianus utahensis Gilmore 1915 [synonym], Testudo hadriana Cope 1872 [synonym]
†Hadrianus majusculus Hay 1904
Invalid names: Testudo uintensis Gilmore 1915 [nomen dubium]
G. †Oligopherus Hutchison 1996
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†Oligopherus laticuneus Cope 1873
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Invalid names: Testudo praeextans Lambe 1913 [synonym], Testudo thomsoni Hay 1908 [synonym], Testudo undabuna Loomis 1909 [synonym]
Fm. Testudinidae Batsch 1788
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G. Chelonoidis Fitzinger 1835
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†Chelonoidis alburyorum Franz and Franz 2009
†Chelonoidis cubensis Leidy 1868
†Chelonoidis monensis Williams 1952
Invalid names: Chelonoidis marcanoi Turvey et al. 2017 [nomen dubium]
G. Gopherus Rafinesque 1832 [gopher tortoise]
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†Gopherus brevisternus Loomis 1909
†Gopherus donlaloi Reynoso and Montellano-Ballesteros 2004
†Gopherus edae Hay 1906
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Invalid names: Testudo hollandi Hay 1906 [synonym], Testudo pansa Hay 1908 [synonym], Testudo vaga Hay 1908 [synonym]
†Gopherus hexagonatus Cope 1893
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Invalid names: Bysmachelys canyonensis Johnston 1937 [synonym], Gopherus huecoensis Strain 1966 [synonym], Testudo campester Hay 1908 [synonym]
†Gopherus mohavensis Merriam 1919
Invalid names: Scaptochelys Bramble 1982 [synonym], Testudo milleri Brattstrom 1961 [nomen dubium]
G. †Hesperotestudo Williams 1950
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†Hesperotestudo bermudae Meylan and Sterrer 2000
†Hesperotestudo ducateli Collins and Lynn 1936
†Hesperotestudo gilbertii Hay 1899
†Hesperotestudo orthopygia Cope 1878
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Invalid names: Geochelone nordensis Holman 1973 [synonym], Testudo rexroadensis Oelrich 1952 [synonym], Xerobates cyclopygius Cope 1878 [synonym]
†Hesperotestudo osborniana Hay 1904
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Invalid names: Caryoderma snovianum Cope 1886 [synonym], Testudo arenivaga Hay 1906 [synonym], Testudo farri Hay 1908 [synonym], Testudo impensa Hay 1908 [synonym]
†Hesperotestudo turgida Cope 1892
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Invalid names: Geochelone alleni Auffenberg 1966 [synonym], Geochelone johnstoni Auffenberg 1962 [synonym], Geochelone mlynarskii Auffenberg 1988 [synonym], Geochelone oelrichi Holman 1972 [synonym], Testudo incisa Hay 1916 [synonym], Testudo riggsi Hibbard 1944 [synonym], Testudo wilsoni Milstead 1956 [synonym]
†Hesperotestudo williamsi Auffenberg 1964
Invalid names: Caudochelys Auffenberg 1963 [synonym], Testudo tedwhitei Williams 1953 [nomen dubium]
G. †Stylemys Leidy 1851
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†Stylemys inusitata Hay 1906
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Invalid names: Stylemys copei Koerner 1940 [synonym], Testudo primaeva Oelrich 1950 [synonym]
†Stylemys nebrascensis Leidy 1851
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Invalid names: Emys culbertsonii Leidy 1852 [synonym], Emys hemispherica Leidy 1851 [synonym], Emys oweni Leidy 1851 [synonym], Gopherus neglectus Brattstrom 1961 [synonym], Testudo amphithorax Cope 1873 [synonym], Testudo emiliae Hay 1908 [synonym], Testudo lata Leidy 1851 [synonym], Testudo ligonius Cope 1873 [synonym]
Invalid names: Stylemys oregonensis Leidy 1872 [nomen dubium], Testudo niobrarensis Leidy 1858 [nomen dubium]
Invalid names: Emys sombrerensis Leidy 1868 [nomen dubium], Floridemys hurdi Weems and George 2013 [nomen dubium], Geochelone (Hesperotestudo) equicomes Hay 1917 [nomen dubium], Gopherus praecedens Hay 1916 [nomen dubium], Stylemys calaverensis Sinclair 1903 [nomen dubium], Testudo annae Hay 1923 [nomen dubium], Testudo atascosae Hay 1902 [nomen dubium], Testudo exornata Lambe 1906 [nomen dubium], Testudo francisi Hay 1923 [nomen dubium], Testudo hayi Sellards 1916 [nomen dubium], Testudo klettiana Cope 1875 [nomen dubium], Testudo laticaudata Cope 1893 [nomen dubium], Testudo louisekressmani Wark 1929 [nomen dubium], Testudo luciae Hay 1916 [nomen dubium], Testudo ocalana Hay 1916 [nomen dubium], Testudo peragrans Hay 1906 [nomen dubium], Testudo pertenuis Cope 1892 [nomen dubium], Testudo quadratus Cope 1884 [nomen dubium], Testudo undata Cope 1875 [nomen dubium]
Invalid names: Chrysemys (Pseudemys) hibbardi Preston 1979 [nomen dubium], Clemmys hesperia Hay 1903 [nomen dubium], Clemmys percrassus Cope 1899 [nomen dubium], Emys euglypha Leidy 1889 [nomen dubium], Emys euthnetus Cope 1873 [nomen dubium], Emys latilabiatus Cope 1871 [nomen dubium], Emys megaulax Cope 1873 [nomen dubium], Emys pachylomus Cope 1873 [nomen dubium], Emys petrolei Leidy 1868 [nomen dubium], Eupachemys obtusus Leidy 1877 [nomen dubium], Hadrianus allabiatus Cope 1871 [nomen dubium], Hybemys arenarius Leidy 1871 [nomen dubium], Notomorpha testudinea Cope 1872 [nomen dubium], Rhinoclemmys nicoyana Acuña-Mesen and Laurito-Mora 1996 [nomen dubium], Testudo culbratus Cope 1873 [nomen dubium], Testudo distans Hay 1916 [nomen dubium], Testudo munda Hay 1920 [nomen dubium], Trachemys delicata Hay 1916 [nomen dubium], Trachemys nuchocarinata Hay 1916 [nomen dubium]
†Echmatemys wyomingensis Leidy 1870
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Invalid names: Echmatemys uintensis Hay 1908 [synonym]