Nan'an tracksite: Bajocian, China
collected by Yang, Lockley 1983, 2001, 2010

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ancorichnus sp.
Xing et al. 2013
Reptilia - Theropoda
Chongqingpus nananensis n. gen., n. sp. Yang and Yang 1987
CFNY 1, 4; some of series V1394, 1396, 6; trackways A-C
Reptilia - Theropoda - Grallatoridae
Chongqingpus yemiaoxiensis n. sp. Yang and Yang 1987
1 individual
trackway D
Reptilia - Moyenisauropodidae
? Anomoepus sp. Hitchcock 1848
Xing et al. 2013
some of series V1395
    = cf. Anomoepus sp. Hitchcock 1848
Xing et al. 2017
unclassified
cf. Planolites sp. Nicholson 1873
Xing et al. 2013
see common names

Geography
Country:China State/province:Chongqing County:Chongqing
Coordinates: 29.6° North, 106.6° East (view map)
Paleocoordinates:30.6° North, 111.5° East
Basis of coordinate:based on nearby landmark
Altitude:215 meters
Geographic resolution:outcrop
Time
Period: Jurassic Epoch: Middle Jurassic
Stage: Bajocian 10 m.y. bin: Jurassic 4
Key time interval: Bajocian
Age range of interval: 170.9 - 168.2 m.y. ago
Stratigraphy
Geological group:Chongqing Formation:Shaximiao Member:Lower
Stratigraphic resolution:bed
Stratigraphy comments: orig. assigned to Xiashaximiao Fm.
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:wave ripples "siliciclastic"
Includes fossils?Y
Environment:terrestrial indet.
Taphonomy
Modes of preservation:mold/impression,trace
Size of fossils:macrofossils
Spatial orientation:life position
Preservation of anatomical detail:poor
Temporal resolution:snapshot
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:surface (in situ),survey of museum collection
Reason for describing collection:general faunal/floral analysis
Collectors:Yang, Lockley Collection dates:1983, 2001, 2010
Collection method comments: original site destroyed by construction
Metadata
Also known as:Yemoaxi
Database number:60492
Authorizer:M. Carrano Enterer:K. Maguire, M. Carrano
Modifier:G. Varnham Research group:vertebrate
Created:2006-05-16 10:47:02 Last modified:2022-05-06 03:25:47
Access level:the public Released:2006-05-16 10:47:02
Creative Commons license:CC BY
Reference information

Primary reference:
61248. Y. X. Yang and Y. D. Yang. 1987. Sichuan Pen Di Kong Long Zu Yin Hua Shi [Dinosaur Footprints from Mesozoic of Sichuan Basin] 1-30 [M. Carrano/M. Carrano]

Secondary references:

16852ETE M. Matsukawa, M. G. Lockley, and J. Li. 2006. Cretaceous terrestrial biotas of East Asia, with special reference to dinosaur-dominated ichnofaunas: towards a synthesis. Cretaceous Research 27(1):3-21 [M. Carrano/M. Carrano]
83955 L. Xing, M. G. Lockley, H. Klein, G. D. Gierliński, Y. Ye, J. Zhang, W. S. Persons and T. Wang. 2017. First thyreophoran type tracks from the Middle Jurassic Chuanjie Formation of Yunnan Province, China. Ichnos 28(1):8-15 [M. Carrano/M. Carrano]
60848 L.-D. Xing, M. G. Lockley, W. Chen, G. D. Gierlinksi, J.-J. Li, W. S. Persons, M. Matsukawa, Y. Ye, M. K. Gingras and C.-W. Wang. 2013. Two theropod track assemblages from the Jurassic of Chongqing, China, and the Jurassic Stratigraphy of Sichuan Basin. Vertebrata PalAsiatica 51(2):107-130 [M. Carrano/M. Carrano]