Marshosaurus

Marshosaurus
	Skull of a Marshosaurus in the Carnegie Museum of Natural History , Pittsburgh
Temporal occurrence
	Upper Jurassic ( Tithonian )
	152.1 to 145 million years
Locations
	Colorado , Utah ( Morrison Formation );
Systematics
	Dinosaur (dinosauria)
	Lizard dinosaur (Saurischia)
	Theropoda
	Tetanurae
	Megalosauroidea
	Marshosaurus
Scientific name
	Marshosaurus
	Madsen , 1976
Art
	Marshosaurus bicentesimus;

Marshosaurus is a genus of theropod dinosaur from the Upper Jurassic of North America . It was a medium-sized carnivore estimated to be about 5 meters long. So far, an incomplete skull and bones of the residual skeleton are known. Another, newly discovered skeleton has not yet been scientifically described. All finds come from the Morrison Formation , an important fossil deposit .

Marshosaurus was named by James Madsen (1976) after Othniel Charles Marsh , who described numerous dinosaur fossils during the Bone Wars ("bone wars"). The only species is Marshosaurus bicentesimus .

The relationship of this genus is controversial. While Chure and colleagues (1997) consider an assignment to the Carnosauria probable, Holtz and colleagues (2004) temporarily classify him as a representative of the Avetheropoda that cannot be further classified . However, a more recent study by Benson (2010) comes to the conclusion that Marshosaurus was a representative of the Megalosauroidea .

The holotype specimen is a left ilium that came from the Cleveland-Lloyd Quarry, a quarry in central Utah .

Individual evidence

^ Gregory S. Paul : The Princeton Field Guide To Dinosaurs. Princeton University Press, Princeton NJ 2010, ISBN 978-0-691-13720-9 , p. 91, online .
↑ Thomas R. Holtz Jr .: Supplementary Information. 2008. to Thomas R. Holtz Jr .: Dinosaurs. The most complete, up-to-date Encyclopedia for Dinosaur Lovers of all Ages. Random House, New York NY 2007, ISBN 978-0-375-82419-7 (PDF; 184.08 kB).
^ ^A ^b Thomas R. Holtz Jr., Ralph E. Molnar, Philip J. Currie : Basal Tetanurae. In: David B. Weishampel , Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 71-110.
↑ ^a ^b James H. Madsen: A second new theropod dinosaur from the Late Jurassic of east central Utah. In: Utah Geology. Vol. 3, No. 1, 1976, ISSN 0363-1192 , pp. 51-60.
^ Roger BJ Benson: A description of Megalosaurus bucklandii (Dinosauria: Theropoda) from the Bathonian of the UK and the relationships of Middle Jurassic theropods. In: Zoological Journal of the Linnean Society. Vol. 158, No. 4, 2010, ISSN 0024-4082 , pp. 882-935, doi : 10.1111 / j.1096-3642.2009.00569.x .

Web links

Commons : Marshosaurus - collection of images, videos and audio files

[paul_10-1] Gregory S. Paul : The Princeton Field Guide To Dinosaurs. Princeton University Press, Princeton NJ 2010, ISBN 978-0-691-13720-9 , p. 91, online .

[holtz_08-2] Thomas R. Holtz Jr .: Supplementary Information. 2008. to Thomas R. Holtz Jr .: Dinosaurs. The most complete, up-to-date Encyclopedia for Dinosaur Lovers of all Ages. Random House, New York NY 2007, ISBN 978-0-375-82419-7 (PDF; 184.08 kB).

[holtz_04-3] A ^b Thomas R. Holtz Jr., Ralph E. Molnar, Philip J. Currie : Basal Tetanurae. In: David B. Weishampel , Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 71-110.

[madsen_76-4] James H. Madsen: A second new theropod dinosaur from the Late Jurassic of east central Utah. In: Utah Geology. Vol. 3, No. 1, 1976, ISSN 0363-1192 , pp. 51-60.

[benson_10-5] Roger BJ Benson: A description of Megalosaurus bucklandii (Dinosauria: Theropoda) from the Bathonian of the UK and the relationships of Middle Jurassic theropods. In: Zoological Journal of the Linnean Society. Vol. 158, No. 4, 2010, ISSN 0024-4082 , pp. 882-935, doi : 10.1111 / j.1096-3642.2009.00569.x .