Dragon's Grave bonebed (PROXY) (Cretaceous of the United States)

Also known as Edmontosaurus bonebed

Where: Niobrara County, Wyoming (43.1° N, 104.5° W: paleocoordinates 49.5° N, 79.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lance Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; lithology not reported

Size classes: macrofossils, mesofossils

Collection methods: quarrying, mechanical,

• Eggshells and teeth from Troodon. Bivalves are "freshwater".

Primary reference: K. Derstler. 1995. The Dragons' Grave: an Edmontosaurus bonebed containing theropod egg shells and juveniles, Lance Formation (uppermost Cretaceous), Niobrara County, Wyoming. Journal of Vertebrate Paleontology 15(3, suppl.):26A [M. Carrano/M. Carrano/J. Alroy]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 26760: authorized by Matthew Carrano, entered by Matthew Carrano on 29.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• created date somehow set to null, hand-set to an estimated value by JA 30.10.06
Bivalvia indet. Linnaeus 1758 clam
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
 Avetheropoda - Dromaeosauridae
Richardoestesia sp. Currie et al. 1990 coelurosaur
? Saurornitholestes sp. Sues 1978 coelurosaur
? Dromaeosaurus sp. Matthew and Brown 1922 coelurosaur
 Avetheropoda - Troodontidae
Troodon formosus Leidy 1856 coelurosaur
 Avetheropoda - Tyrannosauridae
? Nanotyrannus sp. Bakker et al. 1988 tyrannosaurine
Tyrannosaurus rex Osborn 1905 tyrant lizard king
 Neornithischia - Hadrosauridae
Edmontosaurus annectens Marsh 1892 hadrosaurine
Plantae indet. Haeckel 1866