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Temporal range: Upper Cretaceous
Palaeoscincus costatus.jpg
Palaeoscincus costatus holotype tooth
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Family: Nodosauridae
Genus: Palaeoscincus
Leidy, 1856
Type species
Palaeoscincus costatus
Leidy, 1856

Palaeoscincus (meaning "ancient skink" from the Greek παλαιός and σκίγγος) is a dubious genus of ankylosaurian dinosaur based on teeth from the mid-late Campanian-age Upper Cretaceous Judith River Formation of Montana.[1] Like several other dinosaur genera named by Joseph Leidy (Deinodon, Thespesius, and Trachodon), it is an historically important genus with a convoluted taxonomy that has been all but abandoned by modern dinosaur paleontologists. Because of its wide use in the early 20th century, it was somewhat well known to the general public, often through illustrations of an animal with the armor of Edmontonia and the tail club of an ankylosaurid.

Reassigned species[edit]

Seven species have been referred to this genus over the years, six of which have since been reassigned to other genera:

Today, the type species P. costatus and thereby the genus is considered to be an indeterminate ankylosaurian,[10][11] perhaps an indeterminate nodosaurid.[3][5][12]

See also[edit]


  1. ^ Leidy, J. (1856). "Notice of remains of extinct reptiles and fishes, discovered by Dr. F. V. Hayden in the Bad Lands of the Judith River, Nebraska Territories". Proceedings of the Academy of Natural Sciences of Philadelphia. 8: 72–73.
  2. ^ Broom, R. (1912). "Observations on some specimens of South African fossil reptiles preserved in the British Museum". Transactions of the Royal Society of South Africa. 2: 19–25. doi:10.1080/00359191009519357.
  3. ^ a b Coombs, Jr. (1978). "The families of the ornithischian dinosaur order Ankylosauria" (PDF). Palaeontology. 21 (1): 143–170.
  4. ^ Lambe, L.M. (1902). "On Vertebrata of the mid-Cretaceous of the Northwest Territory. 2. New genera and species from the Belly River Series (mid-Cretaceous)". Contributions to Canadian Paleontology. 3: 25–81.
  5. ^ a b c d e f Coombs Jr., W.P. (1990). Teeth and taxonomy in ankylosaurs. In: Carpenter, K., and Currie, P.J. (eds.). Dinosaur Systematics: Approaches and Perspectives. Cambridge University Press:Cambridge, 269-279. ISBN 0-521-36672-0
  6. ^ Marsh, O.C. (1892). "Notes on Mesozoic vertebrate fossils". American Journal of Science. 44 (260): 171–176. Bibcode:1892AmJS...44..171M. doi:10.2475/ajs.s3-44.260.171.
  7. ^ Henning, C.L. (1914). "Ueber neuer Saurierfunde aus Kanada und deren geologische Position". Naturwissenschaften. 2 (31): 769–776. doi:10.1007/BF01496485.
  8. ^ Gilmore, C.W. (1930). "On dinosaurian reptiles from the Two Medicine Formation of Montana". Proceedings of the United States National Museum. 77 (2839): 1–39. doi:10.5479/si.00963801.77-2839.1.
  9. ^ Hennig, E., 1915, Stegosauria: Fossilium Catalogus I, Animalia pars 9, 16 pp
  10. ^ Carpenter, K. (2001). Phylogenetic analysis of the Ankylosauria. In: Carpenter, K. (ed.). The Armored Dinosaurs. Indiana University Press:Bloomington, 455-483. ISBN 0-253-33964-2
  11. ^ Vickaryous, M.K., Maryańska, T., and Weishampel, D.B., (2004). Ankylosauria. In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). The Dinosauria (second edition). University of California Press:Berkeley, 363-392. ISBN 0-520-24209-2
  12. ^ Ford, T.L. (2000). A review of ankylosaur osteoderms from New Mexico and a preliminary review of ankylosaur armor. In: Lucas, S.G., and Heckert, A.B. (eds.). Dinosaurs of New Mexico. New Mexico Museum of Natural History and Science Bulletin 17:157-176.

External links[edit]