Gurilin Tsav [HMNS-GIN] (Cretaceous of Mongolia)

Also known as Gurlin Tsav, Guriliin Tsav

Where: Omnogov, Mongolia (43.9° N, 100.1° E: paleocoordinates 41.4° N, 89.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: fluvial; fine-grained, white, blue sandstone and paleosol/pedogenic, red mudstone

• some fossils in "the bluish white fine sandstone layers, overlying the red mudstone.""Alternation of sandstone and mudstone layers is its dominant lithology. The paleosol horizons are very frequently observed in the beds."

Size class: macrofossils

Collected by HMNS-GIN in 1993–1995, 1998

Collection methods: surface (in situ), mechanical,

• HMNS-Hayashibara Museum of Natural Sciences

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 127670: authorized by Roger Benson, entered by Roger Benson on 21.05.2012, edited by Matthew Carrano, Jonathan Tennant and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
  -
Reptilia indet.12 Laurenti 1768 reptile
"an enigmatic giant vertebrate with very porous bone histology"
 Dinosauria -
Dinosauria indet.8 Owen 1842 dinosaur
dinosaur eggs and shells; field no. 980808 GT SDV
 Saurischia -
Sauropoda indet.8 Marsh 1878 sauropod
ilium and associated vertebrae
 Ornithischia - Ankylosauridae
Ankylosauridae indet.10 Brown 1908 ankylosaurid
Pelvic parts
 Ornithischia -
Prenocephale prenes3 Maryańska and Osmólska 1974 ornithischian
skull, MPC-D 100/1205 (Field no. 940828 GT WTB)
 Ornithischia - Hadrosauridae
Saurolophus angustirostris9 Rozhdestvensky 1952 hadrosaurine
isolated maxilla, skull fragments; skin impression; field no. 980808 GT WTB
 Theropoda -
Theropoda indet.11 Marsh 1881 theropod
"small theropod digit", skull and vertebrae
 Theropoda - Oviraptoridae
Oksoko avarsan4 Funston et al. 2020 maniraptoran
two new oviraptorosaurians, same species and similar to that found at Bugin Tsav in 1994; field no. 980808 GT COY Oviraptr, SZK Oviraptr
 Theropoda - Ornithomimidae
? Gallimimus sp.11 Osmólska et al. 1972 ornithomimid
long tibia
Gallimimus sp.5 Osmólska et al. 1972 ornithomimid
pubis + ilium
 Theropoda - Tyrannosauridae
Tarbosaurus sp.11 Maleev 1955 tyrannosaurid
partial skeleton with gastroliths; field no. 980808 GT ULZ Tarbo
 Pterosauria -
? Pterosauria indet.5 Kaup 1834 pterosaur
20060820 GT MB
 Crocodylia -
Crocodylia indet.12 Owen 1842 crocodilian
 Testudinata -
Testudinata indet.12 Oppel 1811 turtle
 Testudinata - Sichuanchelyidae
Mongolochelys efremovi7 Khosatzky 1997 turtle
field no. 940829 GT SZK
 Testudines - Lindholmemydidae
Mongolemys sp.6 Khosatzky and Mlynarski 1971 turtle
 Testudines - Trionychidae
Trionychidae indet.1 Gray 1825 softshell turtle
Amyda menneri n. sp.2 Chkhikvadze 1988 softshell turtle