Dryosauridae Explained

Dryosauridae was a family of primitive iguanodonts, first proposed by Milner & Norman in 1984. They are known from Middle Jurassic to Early Cretaceous rocks of Africa, Europe, and North America.^{[1] [2] [3] [4]}

Classification

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]} Under the Phylocode, Madzia et al. (2021) formally defined Dryosauridae as "the largest clade containing Dryosaurus altus but not Iguanodon bernissartensis."^[8] The cladogram below follows their chosen reference phylogeny, taken from the description of Orthomerus dolloi.^[9]

Notes and References

1. Book: Norman, David B. . Weishampel, David B. . Weishampel, David B. . Dodson, Peter . Osmólska Halszka. The Dinosauria . 1990 . University of California Press . Berkeley . 0-520-06727-4 . 510–533 . Iguanodontidae and related ornithopods.
2. Book: Norman, David B. . Weishampel, D.B. . Dodson, P. . Osmólska H.. The Dinosauria . 2nd . 2004. University of California Press . Berkeley . 0-520-24209-2 . 413–437 . Basal Iguanodontia.
3. Book: 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 . Carpenter Kenneth. Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs . Indiana University Press . Bloomington and Indianapolis . 3–16 . 978-0-253-34817-3.
4. Galton . Peter M. . Peter Galton . 2009 . Notes on Neocomian (Lower Cretaceous) ornithopod dinosaurs from England – Hypsilophodon, Valdosaurus, "Camptosaurus", "Iguanodon" – and referred specimens from Romania and elsewhere . 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 . 10.1371/journal.pone.0014075 . 21124919 . 2989904. free . 2010PLoSO...514075M .
6. Andrew T. McDonald . 2011 . The taxonomy of species assigned to Camptosaurus (Dinosauria: Ornithopoda) . Zootaxa . 2783 . 52–68 . 10.11646/zootaxa.2783.1.4 .
7. Paul M. Barrett . Richard J. Butler . 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.
8. Madzia . Daniel . Arbour . Victoria M. . Boyd . Clint A. . Farke . Andrew A. . Cruzado-Caballero . Penélope . Evans . David C. . 2021-12-09 . The phylogenetic nomenclature of ornithischian dinosaurs . PeerJ . 9 . e12362 . 10.7717/peerj.12362 . free . 2167-8359 . 8667728 . 34966571.
9. Madzia . Daniel . Jagt . John W. M. . Mulder . Eric W. A. . 2020-04-01 . Osteology, phylogenetic affinities and taxonomic status of the enigmatic late Maastrichtian ornithopod taxon Orthomerus dolloi (Dinosauria, Ornithischia) . Cretaceous Research . 108 . 104334 . 10.1016/j.cretres.2019.104334 . 2020CrRes.10804334M . 0195-6671. free .