Nan'an tracksite (Jurassic of China)

Also known as Yemoaxi

Where: Chongqing, China (29.6° N, 106.6° E: paleocoordinates 30.6° N, 111.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Member (Shaximiao Formation), Bajocian (170.3 - 168.3 Ma)

• 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).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; siliciclastic sediments

Size class: macrofossils

Preservation: mold/impression, trace

Collected by Yang, Lockley in 1983, 2001, 2010

Collection methods: surface (in situ),

• original site destroyed by construction

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 60492: authorized by Matthew Carrano, entered by Kaitlin Maguire on 16.05.2006, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Reptilia
 Ornithischia - Moyenisauropodidae
cf. Anomoepus sp.1 Hitchcock 1848 ornithopod
some of series V1395
 Theropoda - Grallatoridae
"Chongqingpus yemiaoxiensis n. sp." = Grallator yemiaoxiensis
"Chongqingpus yemiaoxiensis n. sp." = Grallator yemiaoxiensis Yang and Yang 1987 theropod
trackway D
 Theropoda -
"Chongqingpus nananensis n. gen. n. sp." = Kayentapus nananensis
"Chongqingpus nananensis n. gen. n. sp." = Kayentapus nananensis Yang and Yang 1987 theropod
CFNY 1, 4; some of series V1394, 1396, 6; trackways A-C
 Ichnofossils -
cf. Planolites sp.2 Nicholson 1873