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

Where: Gansu, China (41.6° N, 97.6° E: paleocoordinates 41.8° N, 93.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Upper Gray Beds Member (Zhonggou Formation), Early/Lower Albian (112.0 - 109.0 Ma)

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

•Zhang et al. 2015: The palynomorph assemblages contain a large number of biostratigraphically significant palynomorphs, such as numerically abundant tricolpate and rare polyaperturate angiosperm pollen grains, which indicate an Early Albian age for the Zhonggou 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

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