Chenchia: Bajocian, China
collected by C. L. Camp & C.-C. Young 1936

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes
Osteichthyes indet. Huxley 1880
"ganoid"
Reptilia
Testudinata indet. (Oppel 1811)
Yeh 1983
Plesiochelys or Chengyuchelys (depending on whether there is a mesoplastron or not)
Reptilia - Pholidosauridae
Crocodilia indet. Owen 1842
    = Pholidosauridae indet. von Zittel and Eastman 1902
Young 1939
Reptilia - Dinosauria
Dinosauria indet. Owen 1842
Young 1939 2 specimens
Reptilia
Theropoda indet. Marsh 1881
1 specimen
    = Szechuanosaurus campi Young 1942
Young 1942
nomen dubium belonging to Theropoda
Sauropoda indet. Marsh 1878
1 specimen
    = ? Omeisaurus junghsiensis Young 1939
Young 1939
see common names

Geography
Country:China State/province:Sichuan
Coordinates: 29.5° North, 104.4° East (view map)
Paleocoordinates:30.1° North, 109.4° East
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Bajocian 10 m.y. bin:Jurassic 4
Key time interval:Bajocian
Age range of interval:170.30000 - 168.30000 m.y. ago
Stratigraphy
Geological group:Chongqing Formation:Shaximiao Member:Lower
Stratigraphic resolution:bed
Stratigraphy comments: below Tzeliuching limestone, and therefore below Omeisaurus junghsiensis type site

Wang et al. 2018 suggested an Oxfordian age for the lower beds, rather than Middle Jurassic
Several radiometric ages have been reported for the Shaximiao Formation, including 167 Ma or 172 Ma (Zong and Shi, 1997), 167–172 Ma or 178–169 Ma (Gou et al., 2000), 163±3 Ma (Li et al., 2010), 160±4 Ma (Luo et al., 2014), 158±7 Ma (Qian et al., 2016), and 159±2 Ma (Wang et al., 2018). However, more recent studies suggest an older age; Dai et al. 2022 reported a maximum depositional age for the bone-bearing layers of the lower member of the Shaximiao formation to be Bjaocan. Zhou et al. 2022 also supported a late Middle Jurassic age for the Shaximiao Formation (Bathonian-Callovian).
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils
Spatial orientation:random
Preservation of anatomical detail:medium
Disassociated major elements:some
Disassociated minor elements:some
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:IVPP
Collectors:C. L. Camp & C.-C. Young Collection dates:1936
Metadata
Also known as:Chen Chia, Chenxi
Database number:47072
Authorizer:M. Carrano, E. Vlachos Enterer:M. Carrano, E. Vlachos
Modifier:G. Varnham Research group:vertebrate
Created:2005-02-07 06:54:25 Last modified:2022-05-06 03:27:07
Access level:the public Released:2005-02-07 06:54:25
Creative Commons license:CC BY
Reference information

Primary reference:

15531.ETE C.-C. Young. 1937. New Triassic and Cretaceous reptiles in China. Bulletin of the Geological Society of China 17(1):109-120 [M. Carrano/K. Maguire/M. Carrano]

Secondary references:

17258ETE Z. Dong, S. Zhou, and H. Zhang. 1983. [Dinosaurs from the Jurassic of Sichuan]. Palaeontologica Sinica, New Series C, Whole Number 162(23):1-136 [M. Carrano/M. Carrano]
66669 H. Yeh. 1983. A Jurassic turtle from Chenxi, Hunan. Vertebrata PalAsiatica 21(4):286-291 [E. Vlachos/E. Vlachos]
12538ETE C.-C. Young. 1939. On a new Sauropoda, with notes on other fragmentary reptiles from Szechuan. Bulletin of the Geological Society of China 19(3):279-315 [M. Carrano/M. Carrano/M. Carrano]
12540ETE C.-C. Young. 1942. Fossil vertebrates from Kuangyuan, N. Szechuan, China. Bulletin of the Geological Society of China 22(-34):293-309 [M. Carrano/M. Carrano/M. Carrano]