Contents 1 Description 2 Classification 3 See also 4 References 5 External links


Description[edit] Reconstruction of Incisivosaurus The initial description of Incisivosaurus by Xu et al. showed that the skull, which measures approximately 10 cm (3.9 in) in length, preserves the most complete dentition known for any oviraptorosaurian. Their cladistic analysis indicated that Incisivosaurus lies at the base of the oviraptorosaurian group, making it more primitive than Caudipteryx and the oviraptorids. A subsequent study by Osmolska et al. in 2004 described the distinguishing skeletal features of Incisivosaurus, including a long snout that made up about half the total length of the skull, a slender lower jaw with a long fenestra (opening), and its distinctive, large, flattened front teeth. In addition to these unique features, Incisivosaurus shared many traits with more typical oviraptorosaurs, allowing its classification with that group. Several features, including its numerous teeth (most advanced oviraptorids were toothless), show that it was a primitive member of the group, and several features of the skull even support a relationship with the therizinosaurs, another theropod group that was probably herbivorous.[3] In 2009 the holotype skull was scanned and analyzed in three dimensions. The results indicated that Incisivosaurus had less bird - like air spaces in the skull bones than later oviraptorosaurs did. It also found that Incisivosaurus had reduced olfactory lobes and expanded optic lobes similar to ornithomimosaurs. It suggested that the most birdlike features of oviraptorosaurs may have been convergent with birds.[4] Incisivosaurus is assumed to have been feathered like most other maniraptoran theropods. Its total body length has been estimated at just under 1 meter (3.3 feet). It is possible that Incisivosaurus is the same species as Protarchaeopteryx, though more fossil specimens are needed before the two can be directly compared.


Classification[edit] Life restoration Incisivosaurus, as well as its potential synonym Protarchaeopteryx, were included in the phylogenetic analysis of a 2014 study on the group Paraves and its relatives. In the unweight cladogram, Incisivosaurus was rendered as the sister taxon to Protarchaeopteryx, with their group being the most primitive oviraptorosaurians. In both weighted analyses however, Protarchaeopteryx was found to be the most primitive oviraptorosaurian, with Incisivosaurus as the next most basal. One of the weighted cladograms, using TNT, is shown below.[5] Oviraptorosauria Protarchaeopteryx Incisivosaurus Similicaudipteryx Avimimus Microvenator Caudipteryx Caenagnathoidea Caenagnathidae Chirostenotes Gigantoraptor Oviraptoridae Oviraptor Citipati Khaan


See also[edit] Dinosaurs portal Timeline of oviraptorosaur research


References[edit] ^ Chang, S.-C.; Gao, K.-Q.; Zhou, Z.-F.; Jourdan, F. (2017). "New chronostratigraphic constraints on the Yixian Formation with implications for the Jehol Biota". Palaeogeography, Palaeoclimatology, Palaeoecology. 487: 399–406. doi:10.1016/j.palaeo.2017.09.026. ) ^ Xu, X., Cheng, Y.-N. Wang, X.-L., and Chang, C.-H. (2002). "An unusual oviraptorosaurian dinosaur from China." Nature, 419: 291-293. ^ Osmolska, H., Currie, P. J., and Barsbold, R. (2004). "Oviraptorosaura." in The Dinosauria (2nd edition), Weishampel, D. B., Dodson, P., and Osmólska, H., (eds). University of California Press. ^ Balanoff, Amy M., Xu, Xing, Kobayashi, Yoshimura, Matsufune, Yusuke, Norell, Mark. "Cranial Osteology of the Theropod Dinosaur Incisivosaurus gauthieri (Theropoda: Oviraptorosauria)". AMERICAN MUSEUM NOVITATES, Number 3651, NEW YORK, NY 10024 35 pp., 17 figures June 25, 2009 ^ Godefroit, Pascal; Cau, Andrea; Hu, Dong-Yu; Escuillié, François; Wu, Wenhao; Dyke, Gareth (2013). "A Jurassic avialan dinosaur from China resolves the early phylogenetic history of birds". Nature. 498 (7454): 359–362. Bibcode:2013Natur.498..359G. doi:10.1038/nature12168. PMID 23719374. 


External links[edit] sinopix.com (photo of skull, with skull of juvenile Liaoceratops below) Incisivosaurus gauthieri at DigiMorph v t e Oviraptorosauria Kingdom: Animalia Phylum: Chordata Clade: Dinosauria Order: Saurischia Suborder: Theropoda Basal oviraptorosaurs Incisivosaurus Ningyuansaurus Protarchaeopteryx Caudipteridae Caudipteryx Similicaudipteryx Caenagnathoidea Avimimus Nankangia Caenagnathidae Microvenator Anzu Gigantoraptor Elmisaurus Chirostenotes Epichirostenotes Caenagnathasia Macrophalangia Hagryphus Leptorhynchos Ojoraptorsaurus Caenagnathus Oviraptoridae Oviraptor Yulong Nomingia Rinchenia Citipati Wulatelong Banji Shixinggia Jiangxisaurus Ganzhousaurus Nemegtomaia Machairasaurus Conchoraptor Khaan Ajancingenia Heyuannia Corythoraptor Retrieved from "https://en.wikipedia.org/w/index.php?title=Incisivosaurus&oldid=815052836" Categories: Early Cretaceous dinosaurs of AsiaYixian faunaOviraptorosaursTaxa named by Xu XingFossil taxa described in 2002Hidden categories: Articles with 'species' microformats


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Incisivosaurus - Photos and All Basic Informations

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Early CretaceousMegaannumPrecambrianCambrianOrdovicianSilurianDevonianCarboniferousPermianTriassicJurassicCretaceousPaleogeneNeogeneTaxonomy (biology)EAnimalChordateDinosaurSaurischiaTheropodaOviraptorosauriaXu Xing (paleontologist)Type SpeciesGenusTheropodDinosaurCretaceous PeriodPeople's Republic Of ChinaFluvialYixian FormationBarremianBeipiaoLiaoningHerbivorousOmnivorousRodentSpecific Name (zoology)Jacques GauthierPhylogeneticEnlargeOviraptorosauriaCladisticCaudipteryxOviraptoridaeFenestra (anatomy)TherizinosaurHolotypeOrnithomimosaurOviraptorosaurFeatherManiraptoraProtarchaeopteryxEnlargeParavesCladogramBasal (phylogenetics)OviraptorosauriaProtarchaeopteryxSimilicaudipteryxAvimimusMicrovenatorCaudipteryxCaenagnathoideaCaenagnathidaeChirostenotesGigantoraptorOviraptoridaeOviraptorCitipati (dinosaur)KhaanPortal:DinosaursTimeline Of Oviraptorosaur ResearchDigital Object IdentifierBibcodeDigital Object IdentifierPubMed IdentifierDigiMorphTemplate:OviraptorosauriaTemplate Talk:OviraptorosauriaOviraptorosauriaAnimalChordateDinosauriaSaurischiaTheropodaBasal (phylogenetics)NingyuansaurusProtarchaeopteryxRinchenia MongoliensisCaudipteridaeCaudipteryxSimilicaudipteryxCaenagnathoideaAvimimusNankangiaCaenagnathidaeMicrovenatorAnzu (dinosaur)GigantoraptorElmisaurusChirostenotesEpichirostenotesCaenagnathasiaMacrophalangiaHagryphusLeptorhynchos (dinosaur)OjoraptorsaurusCaenagnathusOviraptoridaeOviraptorYulong (dinosaur)NomingiaRincheniaCitipatiWulatelongBanjiShixinggiaJiangxisaurusGanzhousaurusNemegtomaiaMachairasaurusConchoraptorKhaanAjancingeniaHeyuanniaCorythoraptorHelp:CategoryCategory:Early Cretaceous Dinosaurs Of AsiaCategory:Yixian FaunaCategory:OviraptorosaursCategory:Taxa Named By Xu XingCategory:Fossil Taxa Described In 2002Category:Articles With 'species' MicroformatsDiscussion About Edits From This IP Address [n]A List Of Edits Made From This IP Address [y]View The Content Page [c]Discussion About The Content Page [t]Edit This Page [e]Visit The Main Page [z]Guides To Browsing WikipediaFeatured Content – The Best Of WikipediaFind Background Information On Current EventsLoad A Random Article [x]Guidance On How To Use And Edit WikipediaFind Out About WikipediaAbout The Project, What You Can Do, Where To Find ThingsA List Of Recent Changes In The Wiki [r]List Of All English Wikipedia Pages Containing Links To This Page [j]Recent Changes In Pages Linked From This Page [k]Upload Files [u]A List Of All Special Pages [q]Wikipedia:AboutWikipedia:General Disclaimer



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