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Dryosauridae

Extinct family of dinosaurs

Extinct family of dinosaurs

  • †Callovosaurus?
  • Dryosaurus
  • Dysalotosaurus
  • Elrhazosaurus
  • Eousdryosaurus?
  • Iyuku?
  • Valdosaurus
  • Vectidromeus?

Dryosauridae is an extinct family of herbivorous bipedal ornithopod dinosaurs, first proposed by Milner & Norman in 1984. They are known from Middle Jurassic to Early Cretaceous rocks of Africa, Europe, and North America.

Dryosauridae was first proposed in 1984 by British paleontologists Andrew R. Milner and David B. Norman, as a family to unite the early ornithopods Dryosaurus, Valdosaurus, and possibly Parksosaurus and Mochlodon. Milner and Norman separated these taxa from the family Hypsilophodontidae as they showed greater similarity with hadrosaurids and iguanodontids. The spelling had previously been used as a typographical error by Deraniyagala in 1939 for Dyrosauridae. Dryosaurids were cursorial animals adapted for running.

Classification

Until recently, many dryosaurids have been regarded as dubious (Callovosaurus) or as species of the type member, Dryosaurus (Dysalotosaurus, Elrhazosaurus and Valdosaurus). However, more recent studies redescribe these genera as valid. Under the Phylocode, Madzia et al. (2021) formally defined Dryosauridae as "the largest clade containing Dryosaurus altus but not Iguanodon bernissartensis." The cladogram below follows their chosen reference phylogeny, taken from the description of Orthomerus dolloi.

References

References

  1. Norman, David B.. (1990). "The Dinosauria". University of California Press.
  2. Norman, David B.. (2004). "The Dinosauria". University of California Press.
  3. Ruiz-Omeñaca, José Ignacio. (2007). "Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs". Indiana University Press.
  4. Galton, Peter M.. (2009). "Notes on Neocomian (Lower Cretaceous) ornithopod dinosaurs from England – ''Hypsilophodon'', ''Valdosaurus'', "Camptosaurus", "Iguanodon" – and referred specimens from Romania and elsewhere". Revue de Paléobiologie.
  5. Escaso, Fernando. (2014-07-29). "A new dryosaurid ornithopod (Dinosauria, Ornithischia) from the Late Jurassic of Portugal". Journal of Vertebrate Paleontology.
  6. (2010). "New Basal Iguanodonts from the Cedar Mountain Formation of Utah and the Evolution of Thumb-Spiked Dinosaurs". PLOS ONE.
  7. Andrew T. McDonald. (2011). "The taxonomy of species assigned to ''Camptosaurus'' (Dinosauria: Ornithopoda)". Zootaxa.
  8. (2011). "New material of ''Valdosaurus canaliculatus'' (Ornithischia: Ornithopoda) from the Lower Cretaceous of southern England". Special Papers in Palaeontology.
  9. (2021-12-09). "The phylogenetic nomenclature of ornithischian dinosaurs". PeerJ.
  10. (2020-04-01). "Osteology, phylogenetic affinities and taxonomic status of the enigmatic late Maastrichtian ornithopod taxon ''Orthomerus dolloi'' (Dinosauria, Ornithischia)". Cretaceous Research.
  11. Kuhn, O.. (1967). "Amphibien und Reptilien". Gustav Fischer Verlag.
  12. (1984). "Third Symposium on Mesozoic Terrestrial Ecosystems, Short Papers". Attempto Verlag.
  13. (2020-07-20). "A new phylogeny of cerapodan dinosaurs". Historical Biology.
  14. (2014-07-29). "A new dryosaurid ornithopod (Dinosauria, Ornithischia) from the Late Jurassic of Portugal". Journal of Vertebrate Paleontology.
  15. Poole, Karen. (2022). "Phylogeny of iguanodontian dinosaurs and the evolution of quadrupedality". Palaeontologia Electronica.
  16. (2024-03-18). "An unexpected early-diverging iguanodontian dinosaur (Ornithischia, Ornithopoda) from the Upper Jurassic of Portugal". Journal of Vertebrate Paleontology.
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