The holotypeMNHAH D1-033516, consisting of part of the right lower jaw, twelve teeth, four cervical vertebrae, three cervical ribs, a partial right coracoid and a posterior caudal vertebra, was discovered on Awaji Island in Japan in May 2004 by Shingo Kishimoto. In 2005, the find was reported in the scientific literature.[2] Kishimoto in 2013 donated the holotype to Japan's Museum of Nature and Human Activities in the Hyogo Prefecture, where the fossils were prepared by Kazumi Wada, Tomomi Ikeda and Chisato Ota to be described in 2021. The species Yamatosaurus izanagii was named in 2021 by Yoshitsugu Kobayashi, Ryuji Takasaki, Katsuhiro Kubota and Anthony Ricardo Fiorillo. The fossils were found in dark grey mudstones within the upper part Kita-Ama Formation, which was deposited in marine conditions in distal turbidite facies on the edge of the continental slope in an intra-arc basin. The sediments date to subchron 32.1r28, corresponding to the early Maastrichtian stage of the Late Cretaceous, around 71.94–71.69 million years ago, making it roughly contemporaneous with fellow Japanese hadrosaur Kamuysaurus.[1]
Life restoration of Yamatosaurus (foreground) with the contemporaneous Kamuysaurus (background)
EtymologyEdit
The generic name, Yamatosaurus, refers to Yamatai, also known as Yamato, an ancient region in Japan ruled by the Yamato Kingdom, while the specific name, Y. izanagii, refers to the deity Izanagi, who created eight islands in Yamato: Awaji Island (where the holotype was discovered) Shikoku, Oki, Kyushu, Iki, Tsushima, Sado and Honshu.
ClassificationEdit
Yamatosaurus is a basal hadrosaurid, more derived than Hadrosaurus but less than Saurolophinae+Lambeosaurinae. Its presence, along with those of Plesiohadros and Tanius, suggests East Asia may have served as a refuge for basal hadrosaurs in the Late Cretaceous. However, it was also contemporaneous with the more derived Kamuysaurus, suggesting some level of provinciality.
^ abKobayashi, Y.; Takasaki, R.; Kubota, K.; Fiorillo, A. R. (2021). "A new basal hadrosaurid (Dinosauria: Ornithischia) from the latest Cretaceous Kita-ama Formation in Japan implies the origin of hadrosaurids". Scientific Reports. 11 (1): Article number 8547. Bibcode:2021NatSR..11.8547K. doi:10.1038/s41598-021-87719-5. PMC8076177. PMID 33903622.
^Suzuki, D., Saegusa, H. & Furutani, H. 2005. "Newly found hadrosaur fossil co-producing broadleaf fossils from Sumoto, west central Japan". Journal of Vertebrate Paleontology25: 120A
yamatosaurus, meaning, yamato, reptile, genus, basal, hadrosaurid, from, late, cretaceous, maastrichtian, aged, kita, formation, awaji, island, japan, genus, contains, single, species, izanagii, temporal, range, preꞒ, early, maastrichtianholotype, dentary, see. Yamatosaurus meaning Yamato reptile is a genus of basal hadrosaurid from the Late Cretaceous Maastrichtian aged Kita Ama Formation of Awaji Island Japan The genus contains a single species Yamatosaurus izanagii 1 YamatosaurusTemporal range 71 94 71 69 Ma PreꞒ Ꞓ O S D C P T J K Pg N early MaastrichtianHolotype dentary seen from four anglesScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClade DinosauriaClade OrnithischiaClade OrnithopodaFamily HadrosauridaeGenus YamatosaurusKobayashi et al 2021Species Y izanagiiBinomial name Yamatosaurus izanagiiKobayashi et al 2021 Contents 1 Discovery and naming 2 Etymology 3 Classification 4 ReferencesDiscovery and naming EditThe holotype MNHAH D1 033516 consisting of part of the right lower jaw twelve teeth four cervical vertebrae three cervical ribs a partial right coracoid and a posterior caudal vertebra was discovered on Awaji Island in Japan in May 2004 by Shingo Kishimoto In 2005 the find was reported in the scientific literature 2 Kishimoto in 2013 donated the holotype to Japan s Museum of Nature and Human Activities in the Hyogo Prefecture where the fossils were prepared by Kazumi Wada Tomomi Ikeda and Chisato Ota to be described in 2021 The species Yamatosaurus izanagii was named in 2021 by Yoshitsugu Kobayashi Ryuji Takasaki Katsuhiro Kubota and Anthony Ricardo Fiorillo The fossils were found in dark grey mudstones within the upper part Kita Ama Formation which was deposited in marine conditions in distal turbidite facies on the edge of the continental slope in an intra arc basin The sediments date to subchron 32 1r28 corresponding to the early Maastrichtian stage of the Late Cretaceous around 71 94 71 69 million years ago making it roughly contemporaneous with fellow Japanese hadrosaur Kamuysaurus 1 nbsp Life restoration of Yamatosaurus foreground with the contemporaneous Kamuysaurus background Etymology EditThe generic name Yamatosaurus refers to Yamatai also known as Yamato an ancient region in Japan ruled by the Yamato Kingdom while the specific name Y izanagii refers to the deity Izanagi who created eight islands in Yamato Awaji Island where the holotype was discovered Shikoku Oki Kyushu Iki Tsushima Sado and Honshu Classification EditYamatosaurus is a basal hadrosaurid more derived than Hadrosaurus but less than Saurolophinae Lambeosaurinae Its presence along with those of Plesiohadros and Tanius suggests East Asia may have served as a refuge for basal hadrosaurs in the Late Cretaceous However it was also contemporaneous with the more derived Kamuysaurus suggesting some level of provinciality Hadrosauridae HadrosaurusYamatosaurusEuhadrosauria SaurolophinaeLambeosaurinaeReferences Edit a b Kobayashi Y Takasaki R Kubota K Fiorillo A R 2021 A new basal hadrosaurid Dinosauria Ornithischia from the latest Cretaceous Kita ama Formation in Japan implies the origin of hadrosaurids Scientific Reports 11 1 Article number 8547 Bibcode 2021NatSR 11 8547K doi 10 1038 s41598 021 87719 5 PMC 8076177 PMID 33903622 Suzuki D Saegusa H amp Furutani H 2005 Newly found hadrosaur fossil co producing broadleaf fossils from Sumoto west central Japan Journal of Vertebrate Paleontology 25 120A Portals nbsp Dinosaurs nbsp Cretaceous nbsp Japan nbsp This article related to ornithopod dinosaurs is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Yamatosaurus amp oldid 1086254899, wikipedia, wiki, book, books, library,
