Rhabdodontomorpha is a clade of basal iguanodontdinosaurs. This group was named in 2016 in the context of the description, based on Spanish findings of an early member of the Rhabdodontidae. A cladistic analysis was conducted in which it was found that Muttaburrasaurus was the sister species of the Rhabdodontidae sensu Weishampel. Therefore, Paul-Emile Dieudonné, Thierry Tortosa, Fidel Torcida Fernández-Baldor, José Ignacio Canudo and Ignacio Díaz-Martínez defined Rhabdodontomorpha as a nodal clade: the group consisting of the last common ancestor of Rhabdodon priscus Matheron, 1869 and Muttaburrasaurus langdoni Bartholomai and Molnar, 1981; and all its descendants. Within the clade Zalmoxes and Mochlodon are also included.[1] The clade is characterized by the following synapomorphies:[2]
the outline of the dorsal iliac margin is sigmoidal in dorsal view, with the postacetabular process deflected medialward and the pre-acetabular process deflected laterally
the dorsal iliac margin is mediolaterally broader and swollen from above the ischiac peduncle anteriorly (present in Muttaburrasaurus) or above the postacetabular process all along (present in Zalmoxes spp.)
the presence of a weak, dorsally convex ridge on the ventromedial side of their postacetabular process
the ischiac peduncle of the ilium is lenticular and uniquely anteroposteriorly long
The group consists of small to large plant eaters from Europe and Gondwana. It must have split from other iguanodont groups during the Middle Jurassic.[1] In 2020, the Australian iguanodont Fostoria was also found to belong to this clade.[2]
References
^ abDieudonné, Paul-Emile; Tortosa, Thierry; Fernández-Baldor, Fidel Torcida; Canudo, José Ignacio; Díaz-Martínez, Ignacio (2016). "An Unexpected Early Rhabdodontid from Europe (Lower Cretaceous of Salas de los Infantes, Burgos Province, Spain) and a Re-Examination of Basal Iguanodontian Relationships". PLOS ONE. 11 (6): e0156251. Bibcode:2016PLoSO..1156251D. doi:10.1371/journal.pone.0156251. PMC4917257. PMID 27333279.
^ abDieudonné, P.-E.; Cruzado-Caballero, P.; Godefroit, P.; Tortosa, T. (2020-07-20). "A new phylogeny of cerapodan dinosaurs" (PDF). Historical Biology. 33 (10): 2335–2355. doi:10.1080/08912963.2020.1793979. ISSN 0891-2963. S2CID 221854017.
rhabdodontomorpha, clade, basal, iguanodont, dinosaurs, this, group, named, 2016, context, description, based, spanish, findings, early, member, rhabdodontidae, cladistic, analysis, conducted, which, found, that, muttaburrasaurus, sister, species, rhabdodontid. Rhabdodontomorpha is a clade of basal iguanodont dinosaurs This group was named in 2016 in the context of the description based on Spanish findings of an early member of the Rhabdodontidae A cladistic analysis was conducted in which it was found that Muttaburrasaurus was the sister species of the Rhabdodontidae sensu Weishampel Therefore Paul Emile Dieudonne Thierry Tortosa Fidel Torcida Fernandez Baldor Jose Ignacio Canudo and Ignacio Diaz Martinez defined Rhabdodontomorpha as a nodal clade the group consisting of the last common ancestor of Rhabdodon priscus Matheron 1869 and Muttaburrasaurus langdoni Bartholomai and Molnar 1981 and all its descendants Within the clade Zalmoxes and Mochlodon are also included 1 The clade is characterized by the following synapomorphies 2 the outline of the dorsal iliac margin is sigmoidal in dorsal view with the postacetabular process deflected medialward and the pre acetabular process deflected laterally the dorsal iliac margin is mediolaterally broader and swollen from above the ischiac peduncle anteriorly present in Muttaburrasaurus or above the postacetabular process all along present in Zalmoxes spp the presence of a weak dorsally convex ridge on the ventromedial side of their postacetabular process the ischiac peduncle of the ilium is lenticular and uniquely anteroposteriorly long the acetabulum is noticeably lowRhabdodontomorphaTemporal range Cretaceous 125 66 Ma PreꞒ Ꞓ O S D C P T J K Pg NMuttaburrasaurus mount at the Queensland MuseumScientific classificationKingdom AnimaliaPhylum ChordataClade DinosauriaOrder OrnithischiaClade OrnithopodaClade IguanodontiaClade RhabdodontomorphaDieudonne et al 2016Subgroups Fostoria Muttaburrasaurus Rhabdodontidae The group consists of small to large plant eaters from Europe and Gondwana It must have split from other iguanodont groups during the Middle Jurassic 1 In 2020 the Australian iguanodont Fostoria was also found to belong to this clade 2 References Edit a b Dieudonne Paul Emile Tortosa Thierry Fernandez Baldor Fidel Torcida Canudo Jose Ignacio Diaz Martinez Ignacio 2016 An Unexpected Early Rhabdodontid from Europe Lower Cretaceous of Salas de los Infantes Burgos Province Spain and a Re Examination of Basal Iguanodontian Relationships PLOS ONE 11 6 e0156251 Bibcode 2016PLoSO 1156251D doi 10 1371 journal pone 0156251 PMC 4917257 PMID 27333279 a b Dieudonne P E Cruzado Caballero P Godefroit P Tortosa T 2020 07 20 A new phylogeny of cerapodan dinosaurs PDF Historical Biology 33 10 2335 2355 doi 10 1080 08912963 2020 1793979 ISSN 0891 2963 S2CID 221854017 Portals Dinosaurs Paleontology Cretaceous Retrieved from https en wikipedia org w index php title Rhabdodontomorpha amp oldid 1050829419, wikipedia, wiki, book, books, library,
