Testudinata

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

See text

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 it was first coined as the group containing turtles by Klein in 1760, it was first defined in the modern sense by Joyce and colleagues in 2004. Testudinata does not include the primitive stem-turtle Odontochelys, which only had the bottom half of a shell.[2]

Classification

The cladogram below follows an analysis by Jérémy Anquetin in 2012.[2]

 

 

Odontochelys

 
 Testudinata 

 

†Proterochersis

 
 

†Proganochelys

 
 

 

†Palaeochersis

 
 

†Australochelys

 
 

 

†Kayentachelys

 
 

†Indochelys

 
 

†Sichuanchelys

 
 

†Chengyuchelys

 
 

†Chuannanchelys

 
 

†Eileanchelys

 
 

 

†Heckerochelys

 
 

†Condorchelys

 
 

 

 

†Naomichelys

 
 

†Otwayemys

 
 

 

†Mongolochelys

 
 Meiolaniidae 

 

†Niolamia

 
 

 

†Ninjemys

 
 

†Meiolania

 
 
 
 
 
 

 

†Kallokibotion

 
 

Testudines (modern turtles)

 
 
 
 
 
 
 
 

References

  1. ↑ Asher J. Lichtig; Spencer G. Lucas; Hendrik Klein; David M. Lovelace (2018). "Triassic turtle tracks and the origin of turtles". Historical Biology: An International Journal of Paleobiology. 30 (8): 1112–1122. doi:10.1080/08912963.2017.1339037.
  2. 1 2 Anquetin, J. R. M. (2012). "Reassessment of the phylogenetic interrelationships of basal turtles (Testudinata)". Journal of Systematic Palaeontology. 10: 3. doi:10.1080/14772019.2011.558928.
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