Testudinata

Clade of reptiles From Wikipedia, the free encyclopedia

Testudinata

Testudinata is the group of all tetrapods with a true turtle shell. It includes both modern turtles (Testudines) and many of their extinct, shelled relatives (stem-turtles), though excluding Odontochelys and Eorhynchochelys, which are placed in the more inclusive Pantestudines.

Quick Facts Scientific classification, Subgroups ...
Testudinata
Temporal range: Late TriassicHolocene, 210–0 Ma Possible Early and Middle Triassic records in the form of fossil tracks[1]
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Skeleton of Proganochelys quenstedti, American Museum of Natural History
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Pantestudines
Clade: Testudinata
Klein, 1760[2]
Subgroups[3]
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History

It was first coined as the group containing turtles by Jacob Theodor Klein in 1760. In 1832-1836, Thomas Bell wrote a book describing the Testudinata, which summarizes all the world's turtles, living and extinct, illustrated by forty plates by Jane S. Bell, James de Carle Sowerby and Edward Lear.[5] It was first defined in the modern sense by Joyce and colleagues in 2004.[2][6] While the ancestral condition for the clade is thought to be terrestrial, members of the subclade Mesochelydia, which contains almost all known testudinatans from the Jurassic onwards, are thought to be ancestrally aquatic.[7]

Classification

The cladogram below follows an analysis by Jérémy Anquetin in 2012.[6]

Odontochelys

Testudinata

Proterochersis

Proganochelys

Palaeochersis

Australochelys

Kayentachelys

Indochelys

Sichuanchelys

Chengyuchelys

Chuannanchelys

Eileanchelys

Heckerochelys

Condorchelys

Naomichelys

Otwayemys

Mongolochelys

Kallokibotion

Testudines (modern turtles)

References

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