Daxishan (Jurassic of China)

Where: Liaoning, China (40.9° N, 119.7° E: paleocoordinates 42.2° N, 122.8° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Tiaojishan Formation, Oxfordian (163.5 - 157.3 Ma)

• "The Tiaojishan Formation is generally regarded as Middle (Zhang & Zheng 1991; Liu et al. 2006; Cheng & Li 2007) to Upper Jurassic (Chang et al. 2009) (Late Bathonian-Early Kimmeridgian) in age, although it may date to the early Middle Jurassic (Aalenian) in Jianchang County (Davis et al. 2001). The unit has been dated using radiometric techniques at 169-152 Mya by Liu et al. (2006) and 165-156 Mya by Zhang et al. (2008)." (Lü et al. 2010, Proceedings B: supplement)

•160 Ma according to Bi et al 2014 (supp info)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, gray, red shale

• The Tiaojishan Formation is represented by intermediate extrusive and pyroclastic rocks, with intercalations of basic volcanic and sedimentary rocks (Fig . 2, ( b), ( c) ; Fig. 3), attaining a thickness of 2420 m. The Tuchengzi Formation, previously recognized as Middle Jurassic, may be Late Jurassic to Early Cretaceous in age according to new investigations of megaplants and isotope dating [14-16] . This formation conformably overlies the Middle Jurassic Tiaojishan Formation, and consists of gray-purple, purple-red shales, and sandstones with large scale cross-bedding ( Fig. 2 ( d) ) .

Size class: macrofossils

Preservation: adpression, soft parts

Collection methods: Liaoning Paleontological Museum collection

Primary reference: D. Hu, L. Hou, L. Zhang and X. Xu. 2009. A pre-Archaeopteryx troodontid theropod from China with long feathers on the metatarsus. Nature 461:640-643 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91487: authorized by John Alroy, entered by John Alroy on 29.09.2009, edited by Jonathan Tennant, Mark Uhen and Graeme Lloyd

Creative Commons license: CC BY (attribution)

Taxonomic list

 Diplostraca - Lioestheriidae
 Avetheropoda -
Serikornis sungei n. gen. n. sp.2 Lefèvre et al. 2017 coelurosaur
Anchiornis huxleyi Xu et al. 2009 coelurosaur
possibly the type locality
 Therapsida -
Maiopatagium furculiferum n. gen. n. sp.3
Maiopatagium furculiferum n. gen. n. sp.3 Meng et al. 2017 mammaliaform
 Therapsida - Eleutherodontidae
Xianshou songae n. sp.1, Xianshou linglong n. gen. n. sp.1
Xianshou songae n. sp.1 Bi et al. 2014 mammaliaform
A skeleton preserved partial skull, mandible, and most of the postcranial skeleton(BMNHC-PM003253, Beijing Natural History Museum, China)
Xianshou linglong n. gen. n. sp.1 Bi et al. 2014 mammaliaform
A skeleton preserved on a split slab of laminated siltstone (IVPP V16707A-B, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China)
 Allotheria -
Shenshou lui n. gen. n. sp.1
Shenshou lui n. gen. n. sp.1 Bi et al. 2014 mammal
A nearly complete skeleton from an adult individual (LDN HMF2001, three paratypes