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Temporal range: Cretaceous, 115–66 Ma
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Ornithischia
Clade: Neornithischia
Clade: Elasmaria
Calvo, Porfiri, and Novas, 2007

Elasmaria is a clade of iguanodont ornithopods known from Cretaceous deposits in South America, Antarctica, and Australia.[1][2]


Calvo et al. (2007) coined Elasmaria to accommodate Macrogryphosaurus and Talenkauen, which they recovered as basal iguanodonts distinct from other iguanodontians in having mineralized plates on the ribs.[3] Later, the putative Gondwanan hypsilophodonts Atlascopcosaurus, Notohypsilophodon, and Qantassaurus were recognized as being distantly related to Hypsilophodon and instead belonging to Elasmaria.[4]


  1. ^ Boyd CA. (2015) The systematic relationships and biogeographic history of ornithischian dinosaurs. PeerJ 3:e1523 https://doi.org/10.7717/peerj.1523
  2. ^ Madzia, Daniel; Boyd, Clint A.; Mazuch, Martin (2017). "A basal ornithopod dinosaur from the Cenomanian of the Czech Republic". Journal of Systematic Palaeontology: 1–13. doi:10.1080/14772019.2017.1371258.
  3. ^ Calvo, J.O.; Porfiri, J.D.; Novas, F.E. (2007). "Discovery of a new ornithopod dinosaur from the Portezuelo Formation (Upper Cretaceous), Neuquén, Patagonia, Argentina". Arquivos do Museu Nacional. 65 (4): 471–483.
  4. ^ Ibiricu, Lucio M.; Martínez, Rubén D.; Luna, Marcelo; Casal, Gabriel A. (2014). "A reappraisal of Notohypsilophodon comodorensis (Ornithischia: Ornithopoda) from the Late Cretaceous of Patagonia, Argentina" (PDF). Zootaxa. 3786 (4): 401–422. doi:10.11646/zootaxa.3786.4.1.
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