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Temporal range: Kimmeridgian
Ischyrosaurus manseli.png
Humerus in multiple views
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Suborder: Sauropodomorpha
Clade: Sauropoda
Genus: Ischyrosaurus
Hulke, 1874
Type species
I. manseli
Hulke, 1874

"Ischyrosaurus" (meaning "strong lizard", for its large humerus; name in quotation marks because it is preoccupied) was a genus of sauropod dinosaur from the Kimmeridgian-age Upper Jurassic Kimmeridge Clay of Dorset, England. It was once synonymized with the Early Cretaceous-age Pelorosaurus.

History and Taxonomy[edit]

"Ischyrosaurus" is based on a partial humerus (NHMUK R41626) found in 1868.[1] John Hulke described it briefly in 1869,[1] then named it in 1874.[2] The genus is preoccupied by a name Edward Drinker Cope coined in 1869.

Like most sauropod remains from the Upper Jurassic-Lower Cretaceous of Europe, it became part of the Pelorosaurus-Ornithopsis taxonomic tangle, being referred first to Ornithopsis as O. manseli,[3] then to Pelorosaurus as P. manseli.[4][5][6] Upchurch et al., in their review of sauropods (2004), listed it as a dubious sauropod.[7] A 2010 overview of Late Jurassic sauropods from Dorset noted that Ischyrosaurus shared features seen in both Rebbachisauridae and Titanosauriformes, but lacked features to nail down its exact phylogenetic position.[8]


As a sauropod, it would have been a large quadrupedal herbivore.[7]


  1. ^ a b Hulke, J. W. (1869). "Note on a large Saurian Humerus from the Kimmeridge Clay of the Dorset Coast". Quarterly Journal of the Geological Society. 25 (1–2): 386–389. doi:10.1144/GSL.JGS.1869.025.01-02.66.
  2. ^ Hulke, J. W. (1874). "Note on a very Large Saurian Limb-bone adapted for Progression upon Land, from the Kimmeridge Clay of Weymouth, Dorset" (PDF). Quarterly Journal of the Geological Society. 30 (1–4): 16–17. doi:10.1144/GSL.JGS.1874.030.01-04.17.
  3. ^ Lydekker, R. (1888). Catalogue of the Fossil Reptilia and Amphibia in the British Museum (Natural History). Part I. Containing the Orders Ornithosauria, Crocodilia, Dinosauria, Squamata, Rhynchocephalia, and Proterosauria. British Museum (Natural History):London, 1-309.
  4. ^ von Huene, F. (1909). Skizze zu einer Systematik und Stammesgeschichte der Dinosaurier. Centralblatt für Mineralogie, Geologie und Paläontologie 1909:12-22. [German]
  5. ^ Romer, A.S. (1956). Osteology of the Reptiles. University of Chicago Press:Chicago 1-772. ISBN 0-89464-985-X
  6. ^ Steel, R. (1970). Part 14. Saurischia. Handbuch der Paläoherpetologie/Encyclopedia of Paleoherpetology. Part 14. Gustav Fischer Verlag:Stuttgart p. 1-87.
  7. ^ a b Upchurch, P.M., Barrett, P.M., and Dodson, P. (2004). Sauropoda. In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). The Dinosauria (2nd edition). University of California Press:Berkeley 259-322. ISBN 0-520-24209-2
  8. ^ Paul M. Barrett, Roger B.J. Benson and Paul Upchurch (2010). "Dinosaurs of Dorset: Part II, the sauropod dinosaurs (Saurischia, Sauropoda) with additional comments on the theropods". Proceedings of the Dorset Natural History and Archaeological Society 131: 113–126.

External links[edit]