Dashankou locality (Permian of China)

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

• "The Xidagou Formation is fluvial deposit which is characterized by a reddish medium to coarse sandstone containing pebbles, but the vertebrate fossils occur in a red mudstone in the upper part of the unit." (Liu et al., 2009, APP).

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)

Taxonomic list

Reptilia
 Bolosauria - Bolosauridae
Belebey chengi n. sp.3 Müller et al. 2008 parareptile
 Eureptilia - Captorhinidae
Gansurhinus qingtoushanensis n. gen. n. sp.4 Reisz et al. 2011 eureptile
IVPP V15989 (holotype)
Osteichthyes
 Therapsida - Anteosauridae
"Sinophoneus yumenensis n. gen. n. sp." = Sinophoneus yumenensis, "Stenocybus acidentatus n. gen. n. sp." = Sinophoneus yumenensis
"Sinophoneus yumenensis n. gen. n. sp." = Sinophoneus yumenensis Cheng and Ji 1996 therapsid
GMV 1601 (holotype); IVPP V18120, a slightly distorted skull with lower jaws and some postcranial elements; IVPP V18117–18119 and 18121–18123, six skulls with lower jaws; IVPP V18124, a nearly complete right dentary with 10 teeth; IVPP V18125, an incomplete left dentary with 14 teeth; IVPP V18126, an incomplete left maxilla with teeth; IVPP V18127, eight continuous presacral vertebrae with some ribs.
"Stenocybus acidentatus n. gen. n. sp." = Sinophoneus yumenensis Cheng and Ji 1996 therapsid
IGCAGS V361 (holotype); IVPP V12008 (paratype). Specimens referred by Jiang & Ji (2014): GS-DSK-011, 012
 Anomodontia -
Biseridens qilianicus n. gen. n. sp.
Biseridens qilianicus n. gen. n. sp. Li and Cheng 1997 therapsid
IGCAGS V362 (holotype); IVPP V12009 (paratype); catalogue numbers are from Li & Cheng (1997); IVPP V16013 (the specimen reported and described by Liu et al., 2010)
 Therapsida -
Raranimus dashankouensis n. gen. n. sp.2
Raranimus dashankouensis n. gen. n. sp.2 Liu et al. 2009 therapsid
IVPP V15424 (holotype)
 Tetrapoda - Bystrowianidae
Yumenerpeton yangi n. gen. n. sp.1
Yumenerpeton yangi n. gen. n. sp.1 Jiang et al. 2017 tetrapod
GS-DSK-016, sacral vertebra with scute (holotype). GS-DSK-017.
 Tetrapoda - Chroniosuchidae
Phratochronis qilianensis n. gen. n. sp., Ingentidens corridoricus n. gen. n. sp.
Phratochronis qilianensis n. gen. n. sp. Li and Cheng 1999 tetrapod
IGCAGS V364 (holotype); catalogue number is from Li & Cheng (1999)
Ingentidens corridoricus n. gen. n. sp. Li and Cheng 1999 tetrapod
IGCAGS V363 (holotype); catalogue number is from Li & Cheng (1999)
Amphibia
 Temnospondyli - Dissorophidae
Anakamacops petrolicus n. gen. n. sp.
Anakamacops petrolicus n. gen. n. sp. Li and Cheng 1999 tetrapod
IGCAGS V365 (holotype); catalogue number is from Li & Cheng (1999)