Dryosauridae

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Not to be confused with Dyrosauridae.

Dryosaurids
Temporal range: Middle Jurassic – Early Cretaceous, 164–115 Ma
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D. lettowvorbecki.jpg
Dysalotosaurus skeletal mount in Berlin
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
Subgroups

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[]

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

 
 
 
 
 
 
 

References[]

  1. ^ Norman, David B.; Weishampel, David B. (1990). "Iguanodontidae and related ornithopods". In Weishampel, David B.; Dodson, Peter; 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.; 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; 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 978-0-253-34817-3.
  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)" (PDF). Zootaxa. 2783: 52–68. doi:10.11646/zootaxa.2783.1.4.
  7. ^ a b Paul M. Barrett; Richard J. Butler; Richard J. Twitchett; Stephen Hutt (2011). "New material of Valdosaurus canaliculatus (Ornithischia: Ornithopoda) from the Lower Cretaceous of southern England". Special Papers in Palaeontology. 86: 131–163.
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