Also known as Qingtoushan

Where: Gansu, China (39.7° N, 97.7° E: paleocoordinates 32.9° N, 78.4° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Qingtoushan Formation, Roadian (272.3 - 268.8 Ma)

• Currently, the Dashankou locality is attributed to the early Roadian based on the occurence of basal members of different therapsid clades and a very basal therapsid as well as forms characteristic for the Middle Permian of Russia (Belebey, Anakamacops) (Liu et al., 2009, APP).

•Formerly called the Xidagou Formation, but now referred to as the Qingtoushan Formation - see Liu et al. (2012) for details.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; red mudstone

Size class: macrofossils

Collected by Z. Cheng, P. Li, among others in 1991, 1992, 1998; reposited in the IVPP

• GMV = Geological Museum of China, Beijing

•IGCAGS = Institute of Geology of Chinese Academy of Geological Sciences, Bejing

Primary reference: J.-L. Li. 2001. The most primitive lower tetrapod fauna in China. Science in China Series D: Earth Sciences 44(1):47-51 [J. Mueller/T. Liebrecht/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85431: authorized by Johannes Mueller, entered by Torsten Liebrecht on 18.12.2008, edited by Richard Butler

Creative Commons license: CC BY (attribution)