Tsondolein-Khuduk 2 (SSE) (Cretaceous to of China)

Also known as Sino-Swedish Expedition

Where: Nei Mongol, China (41.4° N, 103.5° E: paleocoordinates 38.8° N, 92.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ulansuhai Formation, Campanian to Campanian (83.6 - 66.0 Ma)

• "The red sediments in this area likely belong to the Ulansuhai Formation, and are constrained by radiometric dates to the Late Cretaceous, post ~92 Ma (Kobayashi et al. 2003)." - Evans et al. (2021). Collection was previously recorded as part of the Minhe Formation (E. Dunne)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; red conglomerate

Size class: macrofossils

Collected by Bexell in 1930

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

• "Gerhard Bexell found the holotype and only known specimen of Sinocephale bexelli between August 1930 and May 1931 as part of the Sino-Swedish Palaeontological Expeditions." - Evans et al. (2021)

Primary reference: B. Bohlin. 1953. VI. Vertebrate Palaeontology 6. Fossil reptiles from Mongolia and Kansu. Reports from the Scientific Expedition to the North-western Provinces of China under Leadership of Dr. Sven Hedin. The Sino-Swedish Expedition Publication 37:1-113 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50733: authorized by Matthew Carrano, entered by Matthew Carrano on 19.05.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
  -
Mammalia indet. Linnaeus 1758 mammal
Reptilia
 Ornithischia - Nodosauridae
Nodosauridae indet. Marsh 1890 ankylosaur
 Ornithischia -
Microceratops gobiensis n. gen. n. sp.
Microceratops gobiensis n. gen. n. sp. Bohlin 1953 small horned
 Life -
"Troodon bexelli n. sp." = Sinocephale bexelli
"Troodon bexelli n. sp." = Sinocephale bexelli Bohlin 1953
HOLOTYPE: The unnumbered holotype specimen described by Bohlin (1953) consists of an incomplete parietal that is virtually intact along the midline and on the right side, but is missing most of the left side where it contacts the postorbital, as well as the apex of bone adjacent to the frontal contact. The specimen is composed of two pieces, as originally collected. The largest piece consists of a triangular midline segment with the complete posterior margin. The smaller fragment includes the right postorbital contact and, importantly, the anterolateral part of the temporal chamber roof. High fidelity plaster casts of the holotype are housed at the PMU and the AMNH, under the specimen numbers PMU 23186 and AMNH 2073