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"; meandering fluvial system
• "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: D. E. Fastovsky. 1997. Short summary of the geologyof some selected dinosaur-bearing localities in the western Gobi Desert, Mongolia. Abstract of Report Meeting, Mongolia-Japan Joint Paleontological Expedition 6 [M. Carrano/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 -
Osteichthyes indet.7 Huxley 1880 bony fish
fish bones
Reptilia
 Testudinata -
Testudinata indet.6 Oppel 1811 turtle
carapace; 940628 BTs-I GK
 Pterosauria -
Pterosauria indet.1 Kaup 1834 pterosaur
040810 BTs-I WTB WP270
 Dinosauria -
Dinosauria indet.7 Owen 1842 dinosaur
a tibia of an unidentified dinosaur, eggshells
 Theropoda -
Theropoda indet.6, "Segnosauria indet." = Therizinosauroidea5
Theropoda indet.6 Marsh 1881 theropod
isolated teeth of carnivorous dinosaurs; 940626 BTs I OTG
"Segnosauria indet." = Therizinosauroidea5 Russell and Dong 1994 coelurosaur
 Ornithischia -
Hadrosauroidea indet.3 Huene 1954 ornithopod
040802 BTs-I SZK, femur
Gobihadros mongoliensis n. gen. n. sp.4 Tsogtbaatar et al. 2019 ornithopod
one hadrosaur skeleton; 940625 BTs I, 940628 BTs-I, 950730 BTs-I PJ-1, 2, 010725/010726 BTs-I, 930818 BTs-I
cf. Bactrosaurus sp.2 Gilmore 1933 ornithopod
950729 BTs-I Hadro M-1, 950730 BTs-I Hadro M-2, M-3, U-1, 2