Trionychia

Trionychia is a superfamily of turtles which encompasses the species that are commonly referred to as softshelled turtles as well as some others. The group contains two families, Carettochelyidae, which has only one living species, the pig-nosed turtle (Carettochelys insculpta) native to New Guinea and Northern Australia, and Trionychidae, the softshelled turtles, containing numerous species native to Asia, North America and Africa. These families likely diverged during the late Jurassic.[2] The oldest known stem-trionychian is Sinaspideretes from the Late Jurassic of China.[3][4]

Trionychia
Temporal range: Late Jurassic to recent,
The spiny softshell turtle (Trionychidae)
The pig-nosed turtle (Carettochelyidae)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Clade: Polycryptodira
Superfamily: Trionychia
Hummel, 1929[1]
Families

Carettochelyidae
Trionychidae
and see text

Synonyms
  • Trionychoidea

Systematics

Except for those not assigned to a family, only living genera are listed here.

The eastern mud turtle (Kinosternon subrubrum) is a primitive relative of the true softshells which still has a typical hard turtle shell

References

  1. Rhodin 2011, p. 000.204
  2. Pereira, Anieli G.; Sterli, Juliana; Moreira, Filipe R.R.; Schrago, Carlos G. (August 2017). "Multilocus phylogeny and statistical biogeography clarify the evolutionary history of major lineages of turtles". Molecular Phylogenetics and Evolution. 113: 59–66. doi:10.1016/j.ympev.2017.05.008. ISSN 1055-7903. PMID 28501611.
  3. Ouyang, Hui; Li, Lu; Tong, Haiyan (July 2014). "A revision of Sinaspideretes wimani Young & Chow, 1953 (Testudines: Cryptodira: Trionychoidae) from the Jurassic of the Sichuan Basin, China". Geological Magazine. 151 (4): 600–610. Bibcode:2014GeoM..151..600T. doi:10.1017/S0016756813000575. ISSN 0016-7568. S2CID 128423062.
  4. Evers, Serjoscha W.; Benson, Roger B. J. (January 2019). Smith, Andrew (ed.). "A new phylogenetic hypothesis of turtles with implications for the timing and number of evolutionary transitions to marine lifestyles in the group". Palaeontology. 62 (1): 93–134. doi:10.1111/pala.12384. S2CID 134736808.
  5. One or more basal lineages formerly believed to be a distinct family
Bibliography
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