IVPP 9208-21 quarry, Mazongshan (Cretaceous to of China)

Where: Gansu, China (41.6° N, 97.6° E: paleocoordinates 42.0° N, 93.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Upper Gray Beds Member (Zhonggou Formation), Early/Lower Albian to Early/Lower Albian (112.0 - 105.3 Ma)

• unnamed lower part of group; = Xinminpu Group. "middle gray unit" of formation.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; fine-grained, gray, red sandstone

• "red-gray fine-grained sediments"

Size classes: macrofossils, mesofossils

Collected in 1992; reposited in the IVPP

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

• Collected by the Sino-Japanese Silk Road Dinosaur Expedition.

Primary reference: Z. Dong. 1997. On small theropods from Mazongshan area, Gansu Province, China. In Z. Dong (ed.), Sino-Japanese Silk Road Dinosaur Expedition. China Ocean Press, Beijing 13-18 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45166: authorized by Matthew Carrano, entered by Matthew Carrano on 08.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Avetheropoda - Dromaeosauridae
Dromaeosauridae indet. Colbert and Russell 1969 coelurosaur
 Avetheropoda - Troodontidae
Sinornithoides sp. Russell and Dong 1994 coelurosaur
 Neornithischia -
Psittacosaurus mazongshanensis n. sp.5, Archaeoceratops oshimai n. gen. n. sp.3, "Probactrosaurus mazongshanensis n. sp." = Gongpoquansaurus mazongshanensis4, Siluosaurus zhangqiani n. gen. n. sp.1
Psittacosaurus mazongshanensis n. sp.5 Xu 1997 ornithischian
Archaeoceratops oshimai n. gen. n. sp.3 Dong and Azuma 1997 ornithischian
"Probactrosaurus mazongshanensis n. sp." = Gongpoquansaurus mazongshanensis4 Lü 1997 bird foot dinosaur
IVPP V.11333 (field no. 9208-21), 11334-1 to 18.
Siluosaurus zhangqiani n. gen. n. sp.1 Dong 1997 bird foot dinosaur
 Loricata -
Mesosuchia indet.2 Huxley 1875 crocodilian