Zhangjiawa (Jurassic of China)

Also known as Changchiawa

Where: Yunnan, China (25.2° N, 102.1° E: paleocoordinates 33.8° N, 105.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Zhangjiawa Member (Lufeng Formation), Sinemurian (199.3 - 190.8 Ma)

• The Lufeng Formation has been divided into lower dark/dull purple beds (= Shawan Member) and upper dark/deep red beds (= Zhangjiawa Member). Luo & Wu (1994: In the Shadow of the Dinosaurs, pp. 251–270) argue on the basis of vertebrate biostratigraphy for a probable Sinemurian age for the Zhangjiawa Member and a Hettangian age for the Shawan Member.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the IVPP

Collection methods: mechanical,

Primary reference: C.-C. Young. 1982. [Two primitive mammals from Lufeng, Yunnan]. Selected Works of Yang Zhungjian. Science Press, Beijing 21-25 [M. Carrano/M. Carrano/R. Butler]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 137128: authorized by Richard Butler, entered by Richard Butler on 11.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Loricata - Protosuchidae
Dianosuchus changchiawaensis n. gen. n. sp.2 Young 1982 crocodilian
IVPP V 4730 (holotype), skull
 Therapsida - Tritylodontidae
Dianzhongia longirostrata n. gen. n. sp.1
Dianzhongia longirostrata n. gen. n. sp.1 Cui 1981 therapsid
IVPP V 5072 (holotype), partial skull
 Therapsida -
"Lufengoconodon changchiawaensis n. gen. n. sp." = Sinoconodon rigneyi
"Lufengoconodon changchiawaensis n. gen. n. sp." = Sinoconodon rigneyi Patterson and Olson 1961 mammaliaform
IVPP 4727 (holotype), skull