Opinions from J. H. Hutchison 1996
- 'Anosteira belongs to Anosteirinae'
- 'Anosteirinae belongs to Carettochelyidae'
- 'Anostira trionychoides is recombined as Plastomenus trionychoides' according to E. D. Cope 1872
- 'Anostira trionychoides is recombined as Apalone trionychoides'
- 'Apalone belongs to Apalonina'
- 'Bysmachelys is a subjective synonym of Gopherus'
- 'Chrysemys belongs to Emydidae'
- 'Chrysemys inornata is recombined as Pseudograptemys inornata'
- 'Chrysemys timida belongs to Chrysemys'
- 'Echmatemys belongs to Bataguridae'
- 'Emys culbertsonii is a subjective synonym of Stylemys nebrascensis'
- 'Emys hemispherica belongs to Emys' according to J. Leidy 1851
- 'Emys hemispherica is a subjective synonym of Stylemys nebrascensis'
- 'Emys oweni is a subjective synonym of Stylemys nebrascensis'
- 'Gopherus belongs to Testudinidae'
- 'Gopherus (Gopherus) belongs to Gopherus' according to Rafinesque 1832
- 'Gopherus (Gopherus) belongs to Gopherus'
- 'Gopherus (Oligopherus) belongs to Gopherus'
- 'Graptemys cordifera belongs to Graptemys' according to Clark 1937
- 'Graptemys cordifera is a subjective synonym of Pseudograptemys inornata'
- 'Plastomenus serialis is a nomen dubium'
- 'Platypeltis was reranked as Apalone (Platypeltis) and belongs to Apalone'
- 'Platypeltis amnicola is recombined as Apalone amnicola'
- 'Platypeltis antiqua is a nomen dubium'
- 'Platypeltis extensa is recombined as Apalone extensa'
- 'Platypeltis postera is recombined as Apalone postera'
- 'Platypeltis trepida is a nomen dubium'
- 'Pseudanosteira belongs to Anosteirinae'
- 'Pseudograptemys belongs to Emydidae'
- 'Ptychogasteridae was reranked as the tribe Ptychogastrini and belongs to Bataguridae'
- 'Stylemys belongs to Testudinidae'
- 'Stylemys nebrascensis belongs to Stylemys'
- 'Testudo (Hesperotestudo) was reranked as Hesperotestudo and belongs to Testudinidae'
- 'Testudo amphithorax is recombined as Stylemys amphithorax'
- 'Testudo brontops is recombined as Testudo (Hesperotestudo) brontops' according to Williams 1950
- 'Testudo brontops is recombined as Hesperotestudo brontops'
- 'Testudo cultrata is a nomen dubium'
- 'Testudo exornata is a nomen dubium'
- 'Testudo lata belongs to Testudo' according to J. Leidy 1851
- 'Testudo lata is a subjective synonym of Stylemys nebrascensis'
- 'Testudo laticuneus is recombined as Gopherus (Oligopherus) laticuneus'
- 'Testudo ligonius is a subjective synonym of Stylemys amphithorax'
- 'Testudo ligonius is recombined as Testudo (Hesperotestudo) ligonia' according to Williams 1950
- 'Testudo polyphemus is recombined as Gopherus (Gopherus) polyphemus'
- 'Testudo praeextans is a subjective synonym of Gopherus (Oligopherus) laticuneus'
- 'Testudo quadratus is a subjective synonym of Gopherus (Oligopherus) laticuneus'
- 'Testudo thomsoni is a subjective synonym of Gopherus (Oligopherus) laticuneus'
- 'Trachemys antiqua belongs to Trachemys' according to Clark 1937
- 'Trachemys antiqua is recombined as Chrysemys antiqua'
- 'Trionychinae belongs to Trionychidae'
- 'Trionychini belongs to Trionychinae'
- 'Trionyx heteroglyptus is recombined as Apalone heteroglypta'
- 'Trionyx leucopotamicus is recombined as Apalone leucopotamica'
- 'Trionyx punctiger belongs to Trionyx' according to E. D. Cope 1891
- 'Trionyx punctiger is a subjective synonym of Apalone leucopotamica'
- 'Xenochelys belongs to Kinosternidae'
- 'Xenochelys formosa belongs to Xenochelys'