龜的分類方法有許多,以下為三種龜鱉目(Testudines)和龜鱉亞綱(Testudinata)分類。
下面顯示的是托馬斯和謝弗(Thomson and Shaffer)在2010年給出的進化分支圖:[1]
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Pleurodira
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Trionychia
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見下文的鱷龜科(Chelydridae)、海龜總科(Chelonioidea)、動胸龜總科(Kinosternoidea)、平胸龜科(Platysternidae)、澤龜科(Emydidae)、陸龜科(Testudinidae)和地龜科(Geoemydidae)
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下面顯示的是斯特林(Sterli)在2010年給出的進化分支圖:[2]
Testudinata
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†Proganochelys quenstedti
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†Australochelyidae
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†Palaeochersis talampayensis
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†Australochelys africanus
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†Proterochersis robusta
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†Kayentachelys aprix
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†Condorchelys antiqua
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†Heckerochelys romani
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†Indochelys spatulata
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†Mongolochelys efremovi
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†Meiolaniidae
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†Meiolania platyceps
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†Niolamia argentina
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†Chubutemys copelloi
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†Kallokibotion bajazidi
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†Santanachelys gaffneyi
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†Solnhofia parsonsi
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†Plesiochelyidae
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†Portlandemys macdowelli
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†Plesiochelys solodurensis
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†Dorsetochelys delairi
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†Thalassemys moseri
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Pleurosternidae
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†Pleurosternon bullocki
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†Glyptops plicatulus
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†Dinochelys whitei
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Baenidae
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†Neurankylus eximius
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†Trinitichelys hiatti
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†Plesiobaena antiqua
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†Boremys pulchra
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†Baena arenosa
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†Chisternon undulatum
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†Siamochelys peninsularis
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†Xinjianchelys latimarginalis
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見下文的龜鱉目(Testudines)
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Testudines
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†Hangaiemys hoburensis
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†Judithemys sukhanovi
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†Dracochelys bicuspis
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†Sinemys lens
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†Ordosemys leios
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†Emarginachelys cretacea
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†Adocus beati
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†Zangerlia neimongolensis
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†Basilemys variolosa
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†Peltochelys durlstoensis
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†Sandownia harrisi
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Pleurodira
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下面顯示的是喬伊斯(Joyce)在2007年給出的進化分支圖:[3]
Testudinata
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Proganochelys quenstedti
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Palaeochersis talampayensis
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Australochelys africanus
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Proterochersis robusta
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Kayentachelys aprix
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Meiolania platyceps
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Mongolochelys efremovi
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Kallokibotion bajazidi
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Testudines
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Dorsetochelys delairi
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Paracryptodira
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Pleurosternidae
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Pleurosternon bullocki
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Glyptops plicatulus
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Dinochelys whitei
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Baenidae
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Neurankylus eximius
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Trinitichelys hiatti
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Plesiobaena antiqua
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Boremys pulchra
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Baena arenosa
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Chisternon undatum
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Eucryptodira
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Plesiochelys solodurensis
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Portlandemys mcdowelli
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Solnhofia parsonsi
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Thalassemys moseri
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Sandownia harrisi
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Santanachelys gaffneyi
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Xinjiangchelys latimarginalis
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Hangaiemys hoburensis
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Judithemys sukhavoni
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Dracochelys bicuspis
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Sinemys lens
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Ordosemys leios
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見下文的曲頸龜亞目(Cryptodira)
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