Dryosauridae

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Not to be confused with Dyrosauridae
Dryosaurids
Temporal range: Middle JurassicLate Cretaceous, 163–70Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Clade: Ornithopoda
Clade: Dryomorpha
Superfamily: Dryosauroidea
Milner & Norman, 1984
Family: Dryosauridae
Milner & Norman, 1984

Dryosaurids were primitive iguanodonts. They are known from Middle Jurassic to Early Cretaceous rocks of Africa, Europe, and North America.[1][2][3][4]

Phylogeny[edit]

Until recently many dryosaurids have been regarded as dubious (Callovosaurus and Kangnasaurus) or as species of the type member, Dryosaurus (Dysalotosaurus, Elrhazosaurus and Valdosaurus). However, more recent studies redescribe these genera as valid.[3][4][5][6][7] The cladogram below follows Paul M. Barrett, Richard J. Butler, Richard J. Twitchett and Stephen Hutt (2011).[7]


Rhabdodontidae

Muttaburrasaurus



Rhabdodon



Zalmoxes





Tenontosaurus


Dryomorpha

Ankylopollexia


Dryosauridae

Callovosaurus



Kangnasaurus



Dryosaurus




Dysalotosaurus




Valdosaurus



Elrhazosaurus








According to an abstract at the SVP 2014 conference, Anabisetia, Macrogryphosaurus, and Trinisaura, all from the Late Cretaceous of Gondwana, are members of Dryosauridae. If so, then Elasmaria would be a derived clade of Cretaceous dryosaurids.[8]

History[edit]

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References[edit]

  1. ^ Norman, David B.; Weishampel, David B. (1990). "Iguanodontidae and related ornithopods". In Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.). The Dinosauria. Berkeley: University of California Press. pp. 510–533. ISBN 0-520-06727-4. 
  2. ^ Norman, David B. (2004). "Basal Iguanodontia". In Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 413–437. ISBN 0-520-24209-2. 
  3. ^ a b Ruiz-Omeñaca, José Ignacio; Pereda Suberbiola, Xabier; and Galton, Peter M. (2007). "Callovosaurus leedsi, the earliest dryosaurid dinosaur (Ornithischia: Euornithopoda) from the Middle Jurassic of England". In Carpenter, Kenneth (ed.). Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs. Bloomington and Indianapolis: Indiana University Press. pp. 3–16. ISBN 0-253-34817-X. 
  4. ^ a b Galton, Peter M. (2009). "Notes on Neocomian (Lower Cretaceous) ornithopod dinosaurs from England – Hypsilophodon, Valdosaurus, "Camptosaurus", "Iguanodon" – and referred specimens from Romania and elsewhere" (pdf). Revue de Paléobiologie 28 (1): 211–273. 
  5. ^ McDonald, A.T.; Kirkland, J.I.; DeBlieux, D.D.; Madsen, S.K.; Cavin, J.; Milner, A.R.C.; Panzarin, L. (2010). "New Basal Iguanodonts from the Cedar Mountain Formation of Utah and the Evolution of Thumb-Spiked Dinosaurs". PLoS ONE 5 (11): e14075. doi:10.1371/journal.pone.0014075. PMC 2989904. PMID 21124919. 
  6. ^ Andrew T. McDonald (2011). "The taxonomy of species assigned to Camptosaurus (Dinosauria: Ornithopoda)". Zootaxa 2783: 52–68. 
  7. ^ a b Paul M. Barrett, Richard J. Butler, Richard J. Twitchett and Stephen Hutt (2011). "New material of Valdosaurus canaliculatus (Ornithischia: Ornithopoda) from the Lower Cretaceous of southern England". Special Papers in Palaeontology 86: 131–163. 
  8. ^ Poole, K., 2014. A new phylogeny of iguanodontian dinosaurs. Journal of Vertebrate Paleontology 34 (5): 207A.