The Sunjiagou Formation is a geological formation in Shanxi, China. It is of Lopingian age. The lower and middle parts of the formation consists of intensely bioturbated fine grained sandstones and thinly interbedded mudstones, deposited in a shallow-shore lake depositional environment, while the upper part consists of fine grained sandstone, siltstone and mudstone.[1] Alongside the Naobaogou Formation, it has provided an important vertebrate fauna.

Sunjiagou Formation
Stratigraphic range: Late Wuchiapingian-earliest Induan
TypeGeological formation
Unit ofShiqianfeng Group
UnderliesLiujiagou Formation
OverliesShangshihezi Formation
Thickness100-200 metres
Lithology
PrimarySandstone, Siltstone, Mudstone
Location
Country China
ExtentShanxi

Paleobiota

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Genus Species Material Notes
Sanchuansaurus[2] S. pygmaeus Pareiasaur
Shihtienfenia [2] S. permica Pareiasaur
 
Seroherpeton[3] S. yangquanensis right upper jaw and palate Embolomeri
 
Taoheodon[4] T. baizhijuni Dicynodont
Cryptodontia[5] Indeterminate Partial skull Dicynodont

References

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  1. ^ Chu, Daoliang; Tong, Jinnan; Song, Haijun; Benton, Michael J.; Bottjer, David J.; Song, Huyue; Tian, Li (2015-06-09). "Early Triassic wrinkle structures on land: stressed environments and oases for life". Scientific Reports. 5 (1): 10109. doi:10.1038/srep10109. ISSN 2045-2322. PMC 4460569. PMID 26054731.
  2. ^ a b Benton, Michael J. (August 2016). "The Chinese pareiasaurs". Zoological Journal of the Linnean Society. 177 (4): 813–853. doi:10.1111/zoj.12389. hdl:1983/6d1a4f9b-a768-4b86-acb1-b3ad1f7ee885.
  3. ^ Chen, Jianye; Liu, Jun (2020-12-01). "The youngest occurrence of embolomeres (Tetrapoda: Anthracosauria) from the Sunjiagou Formation (Lopingian, Permian) of North China". Fossil Record. 23 (2): 205–213. doi:10.5194/fr-23-205-2020. ISSN 2193-0066.
  4. ^ Liu, Jun (2020-01-02). "Taoheodon baizhijuni , gen. et sp. nov. (Anomodontia, Dicynodontoidea), from the upper Permian Sunjiagou Formation of China and its implications". Journal of Vertebrate Paleontology. 40 (1): e1762088. doi:10.1080/02724634.2020.1762088. ISSN 0272-4634. S2CID 221749476.
  5. ^ Yi J, Liu J, 2020. Pareiasaur and dicynodont fossils from upper Permian of Shouyang, Shanxi, China. Vertebrata PalAsiatica, 58(1): 16–23