PBDB Collection

Yagaan Khovil [HMNS-GIN] (Cretaceous of Mongolia)

Where: Omnogov, Mongolia (44.1° N, 102.7° E: paleocoordinates 42.0° N, 91.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Nemegt Formation, Maastrichtian (72.1 - 66.0 Ma)

• questionable formation assignment. Lower part of section

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; mudstone and fine-grained, red sandstone

• "alternation of pale red fine sandstone and red mudstone"

Size classes: macrofossils, mesofossils

Collected by HMNS-GIN in 1998, 2000, 2007

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

Primary reference: S. Suzuki and M. Watabe. 2000. Report on the Japan–Mongolia Joint Paleontological Expedition to the Gobi desert, 1998. Hayashibara Museum of Natural Sciences Research Bulletin 1:83-98 [R. Benson/R. Benson/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 108344: authorized by Matthew Carrano, entered by Matthew Carrano on 28.04.2011, edited by Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

• JMJPE visited this locality in 1998, and discovered fragments of turtle skeletons, large sacral vertebrae, bivalves and eggshells. Many dinosaur footprints (those of a hadrosaur) were also found.

Show authors, comments, and common names

Reptilia
Testudinata -	Testudinata indet. Testudinata indet. Oppel 1811 turtle 000810 YK-N SZK Turtle
Testudinata - Sichuanchelyidae	? Mongolochelys sp.⁴ ? Mongolochelys sp.⁴ Khosatzky 1997 turtle
Testudines - Trionychidae	Trionychidae indet.³ Trionychidae indet.³ Gray 1825 softshell turtle
Testudines - Lindholmemydidae	Lindholmemydidae indet.³, cf. Mongolemys sp.⁴ Lindholmemydidae indet.³ Chkhikvadze 1970 turtle shell fragments cf. Mongolemys sp.⁴ Khosatzky and Mlynarski 1971 turtle "Mongolemys-like turtle"
Theropoda - Ornithomimidae	Ornithomimidae indet.⁴ Ornithomimidae indet.⁴ Marsh 1890 ornithomimid partial skeleton; 000811 YK-C BON Ornithomimid
Theropoda - Dendroolithidae	Dendroolithidae indet.⁴ Dendroolithidae indet.⁴ Zhao and Li 1988 coelurosaur
Theropoda - Tyrannosauridae	Tyrannosauridae indet.⁴ Tyrannosauridae indet.⁴ Osborn 1906 tyrannosaurid a caudal vertebra of a large carnosaur, 2 metatarsals, a femur, a vertebra, 1 rib and a supraorbital were collected. The bite marks were recognized on the bone surface of the metatarsal and rib
Theropoda -	Avimimus portentosus¹ Avimimus portentosus¹ Kurzanov 1981 maniraptoran partial skeletons and isolated bones (at least 2 individuals), 000810 YK Avimimus UJ1, UJ2; 070624 YK SZK, 070628 YK ORKH
Avetheropoda -	Carnosauria indet.² Carnosauria indet.² Huene 1920 carnosaur
Theropoda - Elongatoolithidae	Elongatoolithidae indet.⁴ Elongatoolithidae indet.⁴ Zhao 1975 theropod dinosaur eggshell fragments (elongatoolithid and spheroolithid)
Ornithischia - Spheroolithidae	Spheroolithidae indet.⁴ Spheroolithidae indet.⁴ Zhao 1979 ornithopod dinosaur eggshell fragments (elongatoolithid and spheroolithid)
Saurischia -	? Sauropoda indet., Sauropoda indet.⁴ ? Sauropoda indet. Marsh 1878 sauropod large sacral vertebrae Sauropoda indet.⁴ Marsh 1878 sauropod rib
Bivalvia
-	Bivalvia indet. Bivalvia indet. Linnaeus 1758 clam

¹Czepiński 2020; ²Saneyoshi et al. 2010; ³Suzuki and Narmandakh 2004; ⁴Watabe and Tsogtbaatar 2004