Sarcolestes

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Sarcolestes
Temporal range: Middle Jurassic, 163 Ma
Sarcolestes.jpg
Illustrations of the mandible and tooth
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Clade: Eurypoda
Suborder: Ankylosauria
Genus: Sarcolestes
Lydekker, 1893
Species: † S. leedsi
Binomial name
Sarcolestes leedsi
Lydekker, 1893

Sarcolestes (meaning "flesh robber"[citation needed]) is an extinct genus of ankylosaurian ornithischian dinosaur from the Oxford Clay of England. The current type and only species is S. leedsi, and the holotype is a single partial left mandible. The genus and species were named in 1893 by Richard Lydekker, who thought they belonged to a theropod.

Discovery[edit]

Sarcolestes was first named in 1893 by Richard Lydekker, and its type species was designated as S. leedsi. The specific name was to honour Alfred Nicholson Leeds, the discoverer of the specimen, and many others like it. The holotype and only specimen, is a partial left mandible and fused scute that was damaged during excavation. The jaw preserved one entire tooth and two crown tips in its alveolus, with the missing bone in the central section of the mandible. It lacks a preserved predentary, even though the entire mandibular symphysis is preserved and complete.[1]

Classification[edit]

Originally, Lydekker found that Sarcolestes represented a theropod. He cited lack of a predentary as excluding the taxon from ornithopods, and tooth morphology as excluding it from sauropods. Within theropods, it was found to be sufficiently different from one main groups of theropods including Coelurus, Calamosaurus, and Compsognathus, and the megalosaurids including Megalosaurus. Thus, Lydekker placed it in Thecodontosauridae, a group of theropods (now placed in sauropodomorpha) including Thecodontosaurus, that the genus differentiated sufficiently enough from to be retained as a unique genus. Lydekker noted that Sarcolestes was similar in dental morphology to Priodontognathus, and that together they might be shown to be related to scelidosaurids. However, he also noted that together they may represent their own group within Theropoda.[1] In 1901, Franz Nopcsa found that Sarcolestes was in fact herbivorous, and classified it in Stegosauridae with genera such as Polacanthus, Stegosaurus, Hylaeosaurus, Stenopelix and various others.[2] Peter Galton concluded that Sarcolestes represents a genus within Nodosauridae, with a dentary similar to that of Sauropelta.[3] However, others have cast doubt on this assignment and even the validity of Sarcolestes.[4]

See also[edit]

References[edit]

  1. ^ a b Lydekker, R. (1893). "On the Jaw of a New Carnivorous dinosaur from the Oxford Clay of Peterborough". Quarterly Journal of the Geological Society 49: 284–287. doi:10.1144/gsl.jgs.1893.049.01-04.46. 
  2. ^ Nopsca, F. von (1901). "Synopsis und Abstammung der Dinosaurier". Földtani Közlöny 31: 27. 
  3. ^ Galton, P. (1980). "Armored dinosaurs (Ornithischia: Ankylosauria) from the Middle and Upper Jurassic of England". Geobios 13 (6): 825–837. doi:10.1016/S0016-6995(80)80038-6. 
  4. ^ Pereda-Suberbiola, X.; Fuentes, C.; Meijide, M.; Meijide-Fuentes, F.; Meijide-Fuentes, M. Jr. (2007). "New remains of the ankylosaurian dinosaur Polacanthus from the Lower Cretaceous of Soria, Spain". Cretaceous Research 28 (4): 583–596. doi:10.1016/j.cretres.2006.09.001.