Bayshin Tsav I (HMNS-GIN) (Cretaceous to of Mongolia)

Also known as Bayshin-Tsav, BTs-I

Where: Omnogov, Mongolia (43.5° N, 107.8° E: paleocoordinates 45.4° N, 98.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Baynshire Formation, Cenomanian to Cenomanian (100.5 - 83.6 Ma)

• Baynshire Suite = Bayn Shire = Baynshiree. Cenomanian to Santonian date is based upon palaeomagnetic analyses (see Watabe et al. 2009)

• group of beds-level stratigraphic resolution

Environment/lithology: fine channel fill; fine-grained sandstone and gray mudstone

• "a point bar deposit in the channel of the river"
• "fine sandstone and overlying gray mudstone layers"

Size classes: macrofossils, mesofossils

Collected by HMNS-GIN in 1993–1995, 2001, 2004

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

Primary reference: M. Watabe and S. Suzuki. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1993. Hayashibara Museum of Natural Sciences Research Bulletin 1:17-29 [R. Benson/R. Benson/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 137858: authorized by Roger Benson, entered by Roger Benson on 28.12.2012, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

 Osteichthyes -
Osteichthyes indet.3 Huxley 1880 bony fish
fish bones
 Testudinata -
Testudinata indet.2 Oppel 1811 turtle
carapace; 940628 BTs-I GK
 Dinosauria -
Dinosauria indet.3 Owen 1842 dinosaur
a tibia of an unidentified dinosaur, eggshells; 040802 BTs-I SZK
 Saurischia -
Theropoda indet.2 Marsh 1881 theropod
isolated teeth of carnivorous dinosaurs; 940626 BTs I OTG
 Avetheropoda -
"Segnosauria indet." = Therizinosauroidea
"Segnosauria indet." = Therizinosauroidea Russell and Dong 1994 coelurosaur
 Neornithischia -
cf. Bactrosaurus sp.1 Gilmore 1933 bird foot dinosaur
950729 BTs-I Hadro M-1, 950730 BTs-I Hadro M-2, M-3, U-1, 2
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
one hadrosaur skeleton; 940625 BTs I, 940628 BTs-I, 950730 BTs-I PJ-1, 2, 010725/010726 BTs-I