Natural History including Gus Rex

Gryposaurus

The Mounted Skeleton of a Juvenile Gryposaurus. Late Cretaceous, Maastrichtian Stage (approx. 74 million years ago), Judith River Formation, Choteau County, Montana, USA

Cryptocurrency Accepted

Session begins in

July 14, 02:00 PM GMT

Estimate

1,000,000 - 2,000,000 USD

Bid

900,000 USD

Lot Details

Description

Gryposaurus sp.

Late Cretaceous, Maastrichtian Stage (approx. 74 million years ago)

Judith River Formation, Choteau County, Montana, USA

Exhibition-ready mounted skeleton, measuring 8 feet, 10 1/2 inches in length, 36 inches in width, and 5 feet in height on base. 178 fossil elements, mounted on custom armature with additional cast elements. Judging from the relative small body size and degree of bone fusion, it can be determined that this skeleton belonged to a juvenile individual.

Professionally articulated in a life-like pose, walking bipedal with head turned looking left, and mounted with a steel armature on an ovoid base. The bones have been fitted with individual fasteners and holding clasps, which allow for easy disassembly.

Excavated over field seasons in 2014, 2015, and 2016 on private land, Judith River Formation, Choteau County, Montana, USA

Creisler, Benjamin S. (2007). "Deciphering duckbills". In Carpenter, Kenneth (ed.). Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs. Bloomington and Indianapolis: Indiana University Press. pp. 185–210

Hopson, James A. (1975). "The evolution of cranial display structures in hadrosaurian dinosaurs". Paleobiology. 1 (1): 21–43

L. M. Lambe. 1914. "On Gryposaurus notabilis, a new genus and species of trachodont dinosaur from the Belly River Formation of Alberta, with a description of the skull of Chasmosaurus belli." The Ottawa Naturalist 27(11):145-155

Lull, Richard Swann; Wright, Nelda E. (1942). "Hadrosaurian Dinosaurs of North America. Geological Society of America Special Paper 40." Geological Society of America. p. 21; pp. 110-117; pp. 164-172; p. 226

Parks, William A. (1919). "Preliminary description of a new species of trachodont dinosaur of the genus Kritosaurus, Kritosaurus incurvimanus". Transactions of the Royal Society of Canada. Series 3. 13 (4): 51–59.

Weishampel, David B.; Horner, Jack R. (1990). "Hadrosauridae". In Weishampel, David B.; Dodson, Peter; Osmólska Halszka (eds.). The Dinosauria (1st ed.). Berkeley: University of California Press. pp. 534–561

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