Huamuxiao, Ordos Basin (Cretaceous to of China)

Also known as Muhuaxiao, Ordos, SCDP

Where: Nei Mongol, China (39.4° N, 108.4° E: paleocoordinates 40.5° N, 109.5° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Ejinhoro Formation, Valanginian to Valanginian (139.8 - 100.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: eolian; pebbly, intraclastic, red sandstone and gray mudstone

• "alternating red aeolian sandstones and greyish mudstones" Near left foot of troodontid "were scattered cream- and blue-coloured lithic pebbles measuring 1.5-4 mm in diameter, and red clayball clasts up to 16 mm in diameter."

Size class: macrofossils

Collected by SCDP in 1988; reposited in the IVPP

Collection methods: quarrying, mechanical,

Primary reference: Z.-M. Dong. 1994. The field activities of the Sino-Canadian Dinosaur Project in China, 1987-1990. Canadian Journal of Earth Sciences 30(10-11):1997-2001 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46934: authorized by Matthew Carrano, entered by Matthew Carrano on 26.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudines -
Testudines indet.2
Testudines indet.2 Batsch 1788 turtle
 Ornithischia -
Psittacosaurus sp.2, Psittacosaurus ordosensis n. sp.2, Stegosauria indet.2
Psittacosaurus sp.2 Osborn 1923 ceratopsian
Psittacosaurus ordosensis n. sp.2 Russell and Zhao 1996 ceratopsian
Stegosauria indet.2 ornithischian
tooth
 Theropoda - Troodontidae
Sinornithoides youngi n. gen. n. sp.1
Sinornithoides youngi n. gen. n. sp.1 Russell and Dong 1994 maniraptoran
"new species"
 Saurischia -
Saurischia indet.2
Saurischia indet.2 saurischian
 Pterosauria -
Pterosauria indet.2
1Russell and Dong 1994; 2Russell and Zhao 1996