Sinaspideretes

Sinaspideretes is an extinct genus of turtle from the Late Jurassic of China, probably from the Shaximiao Formation. It is considered the earliest and most basal representative of the Trionychia,^[1][2] and is possibly the oldest known member of Cryptodira.^[3] In 2013, it was proposed that this animal and the genus Yehguia are in fact one and the same.^[4]

Sinaspideretes Temporal range: Late Jurassic161.2–155.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Sinaspideretes wimani fossil displayed in Hong Kong Science Museum.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Clade:	Polycryptodira
Superfamily:	Trionychia
Genus:	Sinaspideretes Young and Chow, 1953
Species:	S. wimani
Binomial name
Sinaspideretes wimani Young & Chow, 1953

References

1. 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.
2. "Fossilworks: Sinaspideretes wimani". fossilworks.org. Retrieved 17 December 2021.
3. 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.
4. Tong, Haiyan; Li, Lu; Ouyang, Hui (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. S2CID 128423062.

Sources

• The Age of Dinosaurs in Russia and Mongolia by Michael J. Benton, Mikhail A. Shishkin, David M. Unwin, and Evgenii N. Kurochkin
• Chinese Fossil Vertebrates by Spencer G. Lucas