Bayshin Tsav II (HMNS-GIN): Cenomanian - Santonian, Mongolia
collected by HMNS-GIN 1993–1994, 2001, 2004, 2006

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Dinosauria indet. (Owen 1842)
Ariunchimeg 1997
eggshells; other bones, 040730 BTs-II BD, BD-1, 040731 BTs-II TSGT
Hadrosauridae indet. Cope 1869
Watabe and Suzuki 2000 9 specimens
many femora and tibiae; 930820 BTs-II-1, 6, 7, 8, 930820-21 BTs-II-5, 940625 BTs II, 040731 BTs-II KWR, 040731 BTs-II SZK
    = Hadrosauroidea indet. Huene 1954
Tsogtbaatar and Chinzorig 2010
Hadrosauroidea indet. (Huene 1954)
Watabe et al. 2004 2 individuals
an articulated partial skeleton and isolated bone elements of a hadrosaur; 040731 BTs-II KWR
Reptilia - Hadrosauridae
? Hadrosauridae indet. Cope 1869
Watabe and Suzuki 2000 1 specimen
left tibia, right femur; 930820 BTs-II-2
Reptilia
Bactrosaurus sp. Gilmore 1933
Watabe and Suzuki 2000 1 specimen
a whole skeleton of young Bactrosaurus
Theropoda indet. (Marsh 1881)
Watabe et al. 2004
teeth and claws of theropods; 040731 BTs-II
Reptilia - Ornithomimidae
Ornithomimidae indet. Marsh 1890
Watabe and Suzuki 2000 2 individuals
2 partial skeletons; field no. 940625-BTs-II
Reptilia - Therizinosauridae
Segnosauridae indet. Perle 1979
Watabe and Suzuki 2000 2 specimens
synonym of Therizinosauridae
lower jaws, partial bones of the skull, cervical vertebrae, L humerus, pubis; Segnosauria; 930820 BTs-II-4, 8; 940625 BTs II
Reptilia - Troodontidae
Troodontidae indet. Gilmore 1924
Tsogtbaatar 2004 1 individual
field no. 950728-BTs-Nar
Reptilia - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906
Watabe and Suzuki 2000 1 specimen
ilium, sacrals; 930820 BTs-II-3 (listed as ornithomimosaur in Matsumoto et al. 2000)
Reptilia
Sauropoda indet. Marsh 1878
Reptilia - Azhdarchidae
Azhdarchidae indet. (Nessov 1984)
Watabe et al. 2009 1 element
MPC-d 100/303, isolated cervical vertebra
Reptilia
Testudinata indet. (Oppel 1811)
Watabe et al. 2004
turtle shells
Reptilia - Testudines - Lindholmemydidae
Lindholmemydidae indet. Chkhikvadze 1970
Suzuki and Narmandakh 2004 1 specimen
shell fragments
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
Suzuki and Narmandakh 2004 6 specimens
shell fragments
Reptilia - Testudines - Adocidae
Adocidae indet. Cope 1869
Suzuki and Narmandakh 2004 1 specimen
shell fragments
Reptilia - Testudines - Nanhsiungchelyidae
Nanhsiungchelyidae indet. Yeh 1966
Suzuki and Narmandakh 2004 1 specimen
shell fragments
see common names

Geography
Country:Mongolia State/province:Omnogov
Coordinates: 43.5° North, 107.8° East (view map)
Paleocoordinates:45.4° North, 98.2° East
Basis of coordinate:stated in text
Altitude:905
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Key time interval:Cenomanian - Santonian
Age range of interval:100.50000 - 83.60000 m.y. ago
Stratigraphy
Formation:Baynshire
Stratigraphic resolution:bed
Stratigraphy comments: Baynshire Suite = Bayn Shire = Baynshiree. Cenomanian to Santonian date is based upon palaeomagnetic analyses (see Watabe et al. 2009)
Lithology and environment
Primary lithology:current ripples,fine,coarse,white sandstone
Secondary lithology:gray mudstone
Includes fossils?Y
Lithology description: "The bone bed is one of the bluish white, fine− to coarse−grained sandstone layers"
Environment:fine channel fill
Geology comments: point-bar deposit in an eolian environment; meandering fluvial system
Taphonomy
Modes of preservation:body
Degree of concentration:-bonebed
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:poor
Collection methods and comments
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:general faunal/floral analysis
Collectors:HMNS-GIN Collection dates:1993–1994, 2001, 2004, 2006
Metadata
Also known as:Bayshin-Tsav, BTs-II
Database number:55254
Authorizer:M. Carrano, R. Butler, R. Benson Enterer:M. Carrano, R. Benson, R. Butler
Modifier:M. Carrano Research group:vertebrate
Collections that are a subset of this one:137858, 137859, 168807, 169246
Created:2005-10-03 14:58:31 Last modified:2022-07-29 13:05:21
Access level:the public Released:2005-10-03 14:58:31
Creative Commons license:CC BY
Reference information

Primary reference:
14738.ETE M. Watabe and D. B. Weishampel. 1994. Results of Hayashibara Museum of Natural Sciences–Institute of Geology, Academy of Sciences of Mongolia Joint Paleontological Expedition to the Gobi Desert in 1993. Journal of Vertebrate Paleontology 14(3, suppl.):51A [M. Carrano/M. Carrano]

Secondary references:

76473 Y. Ariunchimeg. 1997. Results of studies of dinosaur eggs. Abstract of Report Meeting, Mongolia-Japan Joint Paleontological Expedition 13 [M. Carrano/M. Carrano]
76481 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]
82301 Y. Matsumoto, R. Hashimoto, and T. Sonoda. 2000. Report of preparation works for Mongolian specimens in HMNS from March 1994 to December 1998. Hayashibara Museum of Natural Sciences Research Bulletin 1:113-127 [M. Carrano/M. Carrano]
41670 S. Suzuki and P. Narmandakh. 2004. Change of the Cretaceous turtle faunas in Mongolia. Hayashibara Museum of Natural Sciences Research Bulletin 2:7-14 [R. Benson/R. Benson]
44038 S. Suzuki and C. Tsogtbaatar. 2010. A catalog of Mongolochelys collected by the HMNS-MPC Joint Paleontological Expedition. Hayashibara Museum of Natural Sciences Research Bulletin 3:119-131 [R. Benson/R. Benson]
35934ETE K. Tsogtbaatar. 2004. Fossil specimens prepared in Mongolian Paleontological Center 1993-2001. Hayashibara Museum of Natural Sciences Research Bulletin 2:123-128 [M. Carrano/M. Carrano]
80151 K. Tsogtbaatar and T. Chinzorig. 2010. Fossil specimens prepared in Mongolian Paleontological Center: 2002–2008. Hayashibara Museum of Natural Sciences Research Bulletin 3:155-166 [M. Carrano/M. Carrano]
42154 M. Watabe and S. Suzuki. 2000. Cretaceous fossil localities and a list of fossils collected by the Hayashibara Museum of Natural Sciences and Mongolian Paleontological Center Joint Paleontological Expedition (JMJPE) from 1993 through 1998. Hayashibara Museum of Natural Sciences Research Bulletin 1:99-108 [R. Benson/R. Benson]
42289 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]
44099 M. Watabe, K. Tsogtbaatar, N. Ichinnorov and R. Barsbold. 2004. Report on the Japan-Mongolia Joint Paleontological Expedition to the Gobi desert, 2001. Hayashibara Museum of Natural Sciences Research Bulletin 2:69-96 [R. Benson/R. Benson]
55298 M. Watabe, K. Tsogtbaatar, S. Suzuki and M. Saneyoshi. 2010. Geology of dinosaur-fossil-bearing localities (Jurassic and Cretaceous: Mesozoic) in the Gobi Desert: Results of the HMNS-MPC Joint Paleontological Expedition. Hayashibara Museum of Natural Sciences Research Bulletin 3:41-118 [M. Carrano/M. Carrano]
35798 M. Watabe, T. Tsuihiji, S. Suzuki and K. Tsogtbaatar. 2009. The first discovery of pterosaurs from the Upper Cretaceous of Mongolia. Acta Palaeontologica Polonica 54(2):231-242 [R. Butler/R. Butler]
42291 W. Watabe and S. Suzuki. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1994. Hayashibara Museum of Natural Sciences Research Bulletin 1:30-44 [R. Benson/R. Benson/M. Carrano]