Trionychia is a superfamily of turtles which encompasses the species that are commonly referred to as softshelled turtles as well as some others. They are found throughout the temperate regions of the world. The Jurassic genus Sinaspideretes is considered the earliest representative of the superfamily.[2]

Temporal range: Late Jurassic to recent, 161.2–0 Ma
Apalone spinifera.jpg
The spiny softshell turtle a species of the Trionychia superfamily
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Clade: Polycryptodira
Superfamily: Trionychia
Hummel, 1929[1]

and see text

  • Trionychoidea


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


  1. ^ Rhodin 2011, p. 000.204
  2. ^ 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. doi:10.1017/S0016756813000575. ISSN 0016-7568.
  3. ^ One or more basal lineages formerly believed to be a distinct family

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