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Dinodocus; Temporal range: Early Cretaceous, 125–122 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Humerus of the holotype
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Genus:	†Dinodocus; Owen, 1884
Species:	†D. mackesoni
Binomial name
	†Dinodocus mackesoni; Owen, 1884
Synonyms
	Pelorosaurus mackesoni Woodward, 1908;

Dinodocus (meaning "terrible beam") is a genus of sauropod dinosaur, named by Richard Owen in 1884. The name is now usually considered a nomen dubium. The only species, D. mackesoni, a name given to some fossil bones from the Lower Greensand Group (Lower Cretaceous) of Hythe, Kent, England, were formerly placed in the genus Pelorosaurus (Mantell, 1850^[1]), but a review by Upchurch et al. (2004) concluded that Dinodocus is a nomen dubium.^[2]

Discovery and naming

The holotype was discovered in 1840 by Mr H. B. Mackeson. In 1841, Richard Owen noted on the fossils.^[3] The holotype, NHMUK 14695, was listed by Owen as "portions of the corocoid, humerus and ulna, iliac, ischial and pubic bones, a large portion of the shaft of a femur, parts of a tibia and fibula, and several metatarsal bones". Owen assigned the specimen to the pliosaur Polyptychodon.^[3] In 1850, Gideon Mantell assigned the specimen to Pelorosaurus^[1] but Richard Owen placed the fossils in a separate genus, Dinodocus, in 1884. In 1908, Dinodocus was synonymized with Pelorosaurus again, this time by Arthur Smith Woodward.^[4] In 2004, Paul Upchurch validated the genus Dinodocus.^[2]

References

^ ^a ^b "Fossilworks: Pelorosaurus". fossilworks.org.
^ ^a ^b Upchurch, P., Barrett, P.M. and Dodson, P. 2004. Sauropoda. In The Dinosauria, 2nd edition. D. Weishampel, P. Dodson, and H. Osmólska (eds.). University of California Press, Berkeley. Pp. 259–322.
^ ^a ^b Owen R (1841) "Report on British Fossil Reptiles. Part II". Page 195. Report of the British Association for the Advancement of Science, 11th Meeting (1841).
^ Woodward A S (May 1908) "Note on Dinodocus mackesoni, a cetiosaurian from the Lower Greensand of Kent". Geological Magazine 5(5): 204-206.