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naashoibitosaurus wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 history 2 description 3 classification 4 paleobiology 5 see also 6 references 7 external links toggle the table of contents naashoibitosaurus 12 languages čeština español فارسی français עברית magyar 日本語 nederlands polski русский tiếng việt 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikispecies wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia extinct genus of dinosaurs naashoibitosaurus temporal range late cretaceous 73 ma preꞓ ꞓ o s d c p t j k pg n skull scientific classification kingdom animalia phylum chordata class reptilia clade dinosauria clade ornithischia clade ornithopoda family hadrosauridae subfamily saurolophinae tribe kritosaurini genus naashoibitosaurus hunt and lucas 1993 type species naashoibitosaurus ostromi hunt and lucas 1993 naashoibitosaurus from navajo naʼashǫ́ʼii bitooh creek lizard is a genus of hadrosaurid dinosaur that lived about 73 million years ago in the late cretaceous and was found in the kirtland formation of the san juan basin in new mexico united states only a partial skeleton has been found to date it was first described as a specimen of kritosaurus by jack horner and has been intertwined with the taxon since its description history edit befitting a genus with a confusing taxonomic history the name of this genus is based on an error david gillette and david thomas collected the type and only known specimen from what was thought to be the naashoibito member of the kirtland formation the youngest member of the kirtland this was commemorated in the name instead it came from the older late campanian age de na zin member 1 horner described the skull in 1992 as that of an immature kritosaurus using it as evidence that gryposaurus was different from kritosaurus 2 at the same time hunt and lucas were describing the postcrania as belonging to edmontosaurus saskatchewanensis 3 when the disconnect became apparent hunt and lucas gave the specimen its own generic name because the skull did not agree with an edmontosaur and they considered kritosaurus indeterminate and thus not usable 4 their assessment was challenged in 2000 by thomas williamson who found the morphological differences between it and kritosaurus to be due to the skulls in question being from individuals of different ages unlike hunt and lucas he considered the type skull of kritosaurus to be diagnostic and thus could compare it to naashoibitosaurus he returned to horner s argument noting as horner had that the nasal crest in other hadrosaurines like prosaurolophus moves back on the skull during growth he also pointed out that the specimen s provenance was incorrect instead of being from younger rocks than kritosaurus it is from rocks of about the same age 1 the next major review in the second edition of the dinosauria again separated the two 5 the absence of the beak and lower jaw in the partial skull of naashoibitosaurus makes comparison even more difficult 6 a 2014 study agreed with previous authors that naashoibitosaurus is similar to kritosaurus but found it to be a distinct species 7 description edit life restoration naashoibitosaurus based as it is on a single partial skeleton nmmnh p 16106 is not well known in terms of anatomy its skull the most thoroughly described portion has a low nasal crest that peaks in front of the eyes but does not strongly arch as in gryposaurus 2 classification edit naashoibitosaurus is a saurolophine hadrosaurid a flat headed or solid crested duckbill it is closest to the solid crested forms like saurolophus 5 if it is the same as kritosaurus kritosaurus would be used because it is the older name but its position vis a vis other duckbills would be the same paleobiology edit as a hadrosaurid naashoibitosaurus would have been a large bipedal quadrupedal herbivore eating plants with a sophisticated skull that permitted a grinding motion analogous to chewing its teeth were continually replacing and packed into dental batteries that contained hundreds of teeth only a relative handful of which were in use at any time plant material would have been cropped by its broad beak and held in the jaws by a cheek like organ feeding would have been from the ground up to 4 meters 13 ft above 5 if it was a separate genus how it would have partitioned resources with the similar kritosaurus is unknown see also edit dinosaurs portal timeline of hadrosaur research references edit 1 2 williamson thomas e 2000 review of hadrosauridae dinosauria ornithischia from the san juan basin new mexico in lucas s g heckert a b eds dinosaurs of new mexico new mexico museum of natural history and science bulletin 17 albuquerque new mexico new mexico museum of natural history and science pp 191 213 1 2 horner john r 1992 cranial morphology of prosaurolophus ornithischia hadrosauridae with descriptions of two new hadrosaurid species and an evaluation of hadrosaurid phylogenetic relationships museum of the rockies occasional paper 2 1 119 hunt adrian p lucas spencer g 1992 stratigraphy paleontology and age of the fruitland and kirtland formations upper cretaceous san juan basin new mexico in lucas s g kues b s williamson t e hunt a p eds new mexico geological society guidebook 43 new mexico geological society pp 217 239 hunt adrian p lucas spencer g 1993 cretaceous vertebrates of new mexico in lucas s g zidek j eds dinosaurs of new mexico new mexico museum of natural history and science bulletin 2 albuquerque new mexico new mexico museum of natural history and science pp 77 91 1 2 3 horner john r weishampel david b forster catherine a 2004 hadrosauridae in weishampel david b dodson peter osmólska halszka eds the dinosauria 2nd ed berkeley university of california press pp 438 463 isbn 0 520 24209 2 kirkland james i hernández rivera rené gates terry paul gregory s nesbitt sterling serrano brañas claudia inés garcia de la garza juan pablo 2006 large hadrosaurine dinosaurs from the latest campanian of coahuila mexico in lucas s g sullivan robert m eds late cretaceous vertebrates from the western interior new mexico museum of natural history and science bulletin 35 albuquerque new mexico new mexico museum of natural history and science pp 299 315 prieto márquez a 2014 skeletal morphology of kritosaurus navajovius dinosauria hadrosauridae from the late cretaceous of the north american south west with an evaluation of the phylogenetic systematics and biogeography of kritosaurini journal of systematic palaeontology 12 2 133 175 bibcode 2014jspal 12 133p doi 10 1080 14772019 2013 770417 external links edit status of fossil species archived 2016 03 03 at the wayback machine pdf file on hadrosaurs v t e ornithopoda kingdom animalia phylum chordata clade dinosauria clade ornithischia clade neornithischia clade cerapoda avemetatarsalia see avemetatarsalia ornithischia see ornithischia ornithopoda see below ornithopoda ornithopoda burianosaurus callovosaurus thescelosauridae hypsilophodontidae gideonmantellia hypsilophodon vectidromeus elasmaria anabisetia atlascopcosaurus chakisaurus diluvicursor fostoria galleonosaurus gasparinisaura isasicursor kangnasaurus leaellynasaura macrogryphosaurus mahuidacursor morrosaurus muttaburrasaurus notohypsilophodon qantassaurus sektensaurus talenkauen tietasaura trinisaura weewarrasaurus rhabdodontomorpha ampelognathus emiliasaura foskeia fostoria muttaburrasaurus obelignathus tenontosauridae convolosaurus iani tenontosaurus rhabdodontidae matheronodon mochlodon pareisactus rhabdodon transylvanosaurus zalmoxes dryomorpha draconyx hesperonyx owenodon dryosauridae dryosaurus dysalotosaurus elrhazosaurus eousdryosaurus iyuku kangnasaurus valdosaurus ankylopollexia barilium bayannurosaurus calvarius camptosaurus cedrorestes cumnoria dakotadon emiliasaura fukuisaurus hippodraco iguanacolossus istiorachis lanzhousaurus lurdusaurus magnamanus napaisaurus oblitosaurus osmakasaurus planicoxa proa ratchasimasaurus riabininohadros theiophytalia uteodon hadrosauriformes bolong hypselospinus jinzhousaurus mantellisaurus morelladon ouranosaurus iguanodontidae barilium comptonatus iguanodon mantellisaurus hadrosauroidea see below hadrosauroidea hadrosauroidea altirhinus bactrosaurus batyrosaurus brighstoneus cariocecus choyrodon claosaurus comptonatus datonglong eolambia equijubus fylax gilmoreosaurus gobihadros gongpoquansaurus gonkoken haolong huehuecanauhtlus hypsibema jeyawati jintasaurus koshisaurus levnesovia lophorhothon nanningosaurus nanyangosaurus penelopognathus plesiohadros portellsaurus probactrosaurus protohadros qianjiangsaurus shuangmiaosaurus siamodon sirindhorna tanius xuwulong yunganglong zhanghenglong zuoyunlong telmatosauridae kryptohadros telmatosaurus tethyshadros hadrosauridae aquilarhinus eotrachodon hadrosaurus lapampasaurus malefica yamatosaurus lambeosaurinae adynomosaurus ajnabia angulomastacator aralosaurus arenysaurus blasisaurus canardia jaxartosaurus kazaklambia latirhinus minqaria nipponosaurus pararhabdodon taleta tsintaosaurus parasaurolophini adelolophus charonosaurus parasaurolophus plesiolophus tlatolophus lambeosaurini amurosaurus corythosaurus hypacrosaurus lambeosaurus magnapaulia olorotitan velafrons saurolophinae barsboldia brachylophosaurini acristavus brachylophosaurus gongshuilong maiasaura ornatops probrachylophosaurus wulagasaurus austrokritosauria bonapartesaurus huallasaurus kelumapusaura secernosaurus kritosaurini ahshislesaurus anasazisaurus coahuilasaurus gryposaurus kritosaurus naashoibitosaurus rhinorex saurolophini augustynolophus prosaurolophus saurolophus edmontosaurini edmontosaurus kamuysaurus kerberosaurus kundurosaurus laiyangosaurus shantungosaurus related articles ichnotaxa amblydactylus anomoepus bonaparteichnium camptosaurichnus caririchnium dakotasaurus dinehichnus hadrosaurichnus iguanodontipus orcauichnites ornithopodichnites shiraminesauropus sousaichnium staurichnium tetrapodosaurus wintonopus ootaxa guegoolithus nomina dubia arstanosaurus cionodon claorhynchus diclonius eucercosaurus fulgurotherium glishades koutalisaurus loncosaurus mandschurosaurus microhadrosaurus ornithotarsus orthomerus pteropelyx siluosaurus stephanosaurus syngonosaurus thespesius tichosteus trachodon willinakaqe other articles arkharavia basturs poble bonebed dakota fossil hadrosaur diet hypsilophodont list of informal dinosaur names contains hadrosaur nomina nuda timeline of hadrosaur research edmontosaurus mummy amnh 5060 edmontosaurus mummy s m r4036 taxon identifiers naashoibitosaurus ostromi wikidata q744334 wikispecies naashoibitosaurus gbif old 4965906 open tree of life 4947931 paleobiology database 66595 retrieved from https en wikipedia org w index php title naashoibitosaurus oldid 1374651462 categories saurolophinae dinosaur genera campanian dinosaurs kirtland formation taxa named by spencer g lucas fossil taxa described in 1993 dinosaurs of the united states hidden categories articles with short description short description is different from wikidata articles with species microformats articles containing navajo language text webarchive template wayback links this page was last edited on 13 september 2026 at 09 07 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you 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