Biology:Rhabdodontomorpha
| Rhabdodontomorpha | |
|---|---|
| |
| Muttaburrasaurus mount at the Queensland Museum | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Ornithopoda |
| Clade: | †Iguanodontia |
| Clade: | †Rhabdodontomorpha Dieudonné et al., 2016 |
| Subgroups | |
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 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 acetabulum is noticeably low
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] Iani, described in 2023, is interpreted as a transitional taxon betweenTenontosaurus and Rhabdodontidae.[3]
References
- ↑ 1.0 1.1 Dieudonné, 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. doi:10.1371/journal.pone.0156251. PMID 27333279. Bibcode: 2016PLoSO..1156251D.
- ↑ 2.0 2.1 Dieudonné, P.-E.; Cruzado-Caballero, P.; Godefroit, P.; Tortosa, T. (2020-07-20). "A new phylogeny of cerapodan dinosaurs". Historical Biology 33 (10): 2335–2355. doi:10.1080/08912963.2020.1793979. ISSN 0891-2963. https://rid.unrn.edu.ar/bitstream/20.500.12049/5441/1/Dieudonn%C3%A9_etal2020.pdf.
- ↑ Zanno, Lindsay E.; Gates, Terry A.; Ayrahami, Haviv M.; Tucker, Ryan T.; Makovicky, Peter J. (2023). "An early-diverging iguanodontian (Dinosauria: Rhabdodontomorpha) from the Late Cretaceous of North America". PLOS ONE 18 (6): e0286042. doi:10.1371/journal.pone.0286042. PMID 37285376.
Wikidata ☰ Q24765920 entry
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