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.
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•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
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 | |
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Sinornithoides sp. Russell and Dong 1994 maniraptoran | |
Dromaeosauridae indet. Colbert and Russell 1969 maniraptoran | |
Siluosaurus zhangqiani n. gen. n. sp.1, "Probactrosaurus mazongshanensis n. sp." = Gongpoquansaurus mazongshanensis4, Psittacosaurus mazongshanensis n. sp.5, Archaeoceratops oshimai n. gen. n. sp.3
"Probactrosaurus mazongshanensis n. sp." = Gongpoquansaurus mazongshanensis4 Lü 1997 ornithopod IVPP V.11333 (field no. 9208-21), 11334-1 to 18.
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