Study on the unique convergent evolution mechanism in ornithomimosaur dinosaurs

• Project/Area Number: 15K05324
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Hokkaido University
• Principal Investigator: Kobayashi Yoshitsugu 北海道大学, 総合博物館, 准教授 (70400033)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 進化 / 古生物

Outline of Final Research Achievements

The degree of pneumatization of the Deinocheirus was beyond sauropods, which is the largest terrestrial animals in the life history. Since this pneumatization is present in a basal form of this group, it was established at the early stage, and this dinosaur group became gigantic by progress of pneumatization along with evolution. Also, the skull has features characterized as a wide beak, a deep lower jaw, and a long snout. They had a structure that made it possible to divide foraging and food. Furthermore, it is thought that gastroliths in the body had a high degree of circularity and had high physical digestive activity in the stomach. Long neural spines have a much more complicated morphology than other dinosaurs. It was considered that long nural spines had multiple functions and evolved by changing the weight of the function as necessary.

Research Products

• [Journal Article] Dinosaur tracks at the Nemegt locality: Paleobiological and paleoenvironmental implications (2018)
  • Author(s): Nakajima Judai、Kobayashi Yoshitsugu、Chinzorig Tsogtbaatar、Tanaka Tomonori、Takasaki Ryuji、Tsogtbaatar Khishigjav、Currie Philip J.、Fiorillo Anthony R.
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 494 Pages: 147-159
  • DOI: 10.1016/j.palaeo.2017.10.026
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ornithomimosaurs from the Nemegt Formation of Mongolia: manus morphological variation and diversity (2018)
  • Author(s): Chinzorig Tsogtbaatar、Kobayashi Yoshitsugu、Tsogtbaatar Khishigjav、Currie Philip J.、Takasaki Ryuji、Tanaka Tomonori、Iijima Masaya、Barsbold Rinchen
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 494 Pages: 91-100
  • DOI: 10.1016/j.palaeo.2017.10.031
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Reanalysis of the phylogenetic status of Nipponosaurus sachalinensis (Ornithopoda: Dinosauria) from the Late Cretaceous of Southern Sakhalin (2017)
  • Author(s): Takasaki Ryuji、Chiba Kentaro、Kobayashi Yoshitsugu、Currie Philip J.、Fiorillo Anthony R.
  • Journal Title: Historical Biology Volume: 30 Issue: 5 Pages: 694-711
  • DOI: 10.1080/08912963.2017.1317766
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] High diversity of the Ganzhou Oviraptorid Fauna increased by a new “cassowary-like” crested species. (2017)
  • Author(s): Lu, J., Li, G., Kundrat, M., Lee, Y., Sun, Z., Kobayashi, Y., Shen, C., Teng, F., and Liu, H.
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 6393-6393
  • DOI: 10.1038/s41598-017-05016-6
  • Peer Reviewed
• [Journal Article] First ornithomimid (Theropoda, Ornithomimosauria) from the Upper Cretaceous Djadokhta Formation of Togrogiin Shiree, Mongolia. (2017)
  • Author(s): Chinzorig, T., Kobayashi, Y., Tsogtbaatar, K., Currie, P., Watabe, M., and Barsbold, R.
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 5835-5835
  • DOI: 10.1038/s41598-017-05272-6
  • Peer Reviewed
• [Journal Article] Neuroanatomy of the ankylosaurid dinosaurs Tarchia teresae and Talarurus plicatospineus from the Upper Cretaceous of Mongolia, with comments on endocranial variability among ankylosaurs. (2017)
  • Author(s): Paulina-Carabajal, A., Lee, Y., Kobayashi, Y., Lee, H., and Currie, P.
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 494 Pages: 135-146
  • DOI: 10.1016/j.palaeo.2017.11.030
  • Peer Reviewed
• [Journal Article] Theropod trackways associated with a Gallimimus foot skeleton from the Nemegt Formation, Mongolia. (2017)
  • Author(s): Lee, H., Lee, Y., Adams, T., Currie, P., Kobayashi, Y., Jacobs, L. and Koppelhus, E.
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 494 Pages: 160-167
  • DOI: 10.1016/j.palaeo.2017.10.020
  • Peer Reviewed
• [Journal Article] Dinosaur eggshells from the Santonian Milk River Formation of Alberta, Canada. (2017)
  • Author(s): Zelenitsky, D., Therrien, F., Tanaka, K., Kobayashi, Y., and Debuhr, C.
  • Journal Title: Cretaceous Research Volume: 74 Pages: 181-187
  • Peer Reviewed
• [Journal Article] The oldest Asian hesperornithiform from the Upper Cretaceous of Japan, and the phylogenetic reassessment of Hesperornithiformes. (2017)
  • Author(s): Tanaka, T., Kobayashi, Y., Kurihara, K., Fiorillo, A., and Kano, M.
  • Journal Title: Journal of Systematic Palaeontology Volume: 1 Issue: 8 Pages: 1-21
  • DOI: 10.1080/14772019.2017.1341960
  • Peer Reviewed
• [Journal Article] Dinosaur eggshells from the Santonian Milk River Formation of Alberta, Canada (2017)
  • Author(s): Darla K. Zelenitsky, D. K., Therrien F., Tanaka, K., Kobayashi, Y. DeBuhr, C.L.
  • Journal Title: Cretaceous Research Volume: 74 Pages: 181-187
  • DOI: 10.1016/j.cretres.2017.02.016
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The oldest record of Alligator sinensis from the Late Pliocene of Western Japan, and its biogeographic implication (2016)
  • Author(s): Iijima, M., Takahashi, K., Kobayashi, Y.
  • Journal Title: Journal of Asian Earth Sciences Volume: 124 Pages: 94-101
  • DOI: 10.1016/j.jseaes.2016.04.017
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Contributions to vertebrate palaeontology in honour of Yukimitsu Tomida. (2016)
  • Author(s): Jacobs, L., Flynn, L., Kimura, Y., Kobayashi, Y., Wang, X. Qiu, Z., Jin, C., Zhang, Y., Taylor, L., Kohno, N., and Winkler, A. J.
  • Journal Title: Historical Biology Volume: 28 Issue: 1-2 Pages: 1-7
  • DOI: 10.1080/08912963.2015.1049839
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Taphonomy of a monodominant Centrosaurus apertus (Dinosauria: Ceratopsia) bonebed from the Upper Oldman Formation of southeastern Alberta. (2015)
  • Author(s): Chiba, K., Ryan, M. J., Braman, D. R., Eberth, D. A., Scott, E. E., Brown, C. M., Kobayashi, Y., and Evans, D. C.
  • Journal Title: PALAIOS Volume: 30 Issue: 9 Pages: 655-667
  • DOI: 10.2110/palo.2014.084
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A new oviraptorid dinosaur (Dinosauria: Oviraptorosauria) from the Late Cretaceous of southern China and its paleobiogeographical implications. (2015)
  • Author(s): Lu;, J., Pu, H., Kobayashi, Y., Xu, L., Chang, H., Shang, Y., Liu, D., Lee, Y., Kundrát, M., and Shen, C.
  • Journal Title: Scientific. Reports Volume: 5 Issue: 1 Pages: 1-15
  • DOI: 10.1038/srep11490
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A new desmostylian mammal from Unalaska (USA), the robust Sanjussen jaw from Hokkaido (Japan), with comments on feeding in derived desmostylids. (2015)
  • Author(s): Chiba, K., Fiorillo, A. R., Jacobs, L. L., Kimura, Y., Kohno, N., Kobayashi, Y., Nishida, Y., Polcyn, M. J. and Tanaka, K.
  • Journal Title: Historical Biology Volume: 27 Issue: 1-2 Pages: 289-303
  • DOI: 10.1080/08912963.2015.1046718
  • Peer Reviewed / Open Access
• [Presentation] モンゴル・ネメグト層から産出するオルニトミモサウルス類：手の形態変化と多様性 (2018)
  • Author(s): Tsogtbaatar Chinzorig、小林快次、Khishigjav Tsogtbaatar、高崎竜司、田中公教・飯島正也
  • Organizer: 日本古生物学会
• [Presentation] 恐竜類の古生態学的研究 (2017)
  • Author(s): 小林快次
  • Organizer: 日本古生物学会
• [Presentation] 香川県さぬき市の上部白亜系和泉層群から産出した恐竜類の椎体 (2017)
  • Author(s): 林昭次、小林快次、真鍋真。川端清司、塚越実、金澤芳廣
  • Organizer: 日本古生物学会
• [Presentation] 骨組織から考察するマチカネワニの年齢と性別 (2017)
  • Author(s): 林昭次、小林快次、飯島正也、佐野祐介、伊東隆臣、恩田紀代子、中野貴由、上田貴洋、江口太郎
  • Organizer: 日本古生物学会
• [Presentation] 白亜紀の潜水鳥類ヘスペロルニス目の体重進化 (2017)
  • Author(s): 田中公教・飯島正也・小林快次・Timothy Tokaryk
  • Organizer: 日本古生物学会
• [Presentation] Nipponosaurus sachalinensisの成長段階の骨組織学的評価及び系統位置の再検討 (2017)
  • Author(s): 高崎竜司、千葉謙太郎、小林快次、Philip Currie, Anthony Fiorillo
  • Organizer: 日本古生物学会
• [Presentation] 獣脚類恐竜オルニトミモサウルス類の走行能力適応：アークトメタターサルの力学的機能 (2017)
  • Author(s): 久保孝太、小林快次
  • Organizer: 日本古生物学会
• [Presentation] モンゴル西部より産出したジュラ紀後期の竜脚類化石 (2017)
  • Author(s): 吉田純輝、Tsogtbaatar Chinzorig、小林快次、Khishigjav Tsogtbaatar
  • Organizer: 日本古生物学会
• [Presentation] RELATIONSHIPS OF DIET AND GASTROLITH SHAPE, USING LAYER CHICKS: IMPLICATION FOR DEINOCHEIRUS DIET (2017)
  • Author(s): R. Takasaki, T. Tanaka, Y. Kobayashi.
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] MULTITAXIC BONEBED OF TWO NEW ORNITHOMIMIDS (THEROPODA, ORNITHOMIMOSAURIA) FROM THE UPPER CRETACEOUS BAYANSHIREE FORMATION OF SOUTHEASTERN GOBI DESERT, MONGOLIA (2017)
  • Author(s): T. Chinzorig, Y. Kobayashi, M. Saneyoshi, K. Tsogtbaatar, Z. Badamkhatan, T. Ryuji
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] ORNITHOMIMID MATERIAL FROM THE LOWER SCOLLARD FORMATION (UPPER MAASTRICHTIAN) OF ALBERTA, CANADA, CONFIRMS THE PRESENCE OF ORNITHOMIMIDS, INCLUDING ONE LARGE-BODIED TAXON, AT THE END OF THE CRETACEOUS PRIOR TO THE CRETACEOUS-PALEOGENE BOUNDARY (2017)
  • Author(s): R. E. Nottrodt, F. Therrien, D. K. Zelenitsky, Y. Kobayashi
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] KINEMATIC FUNCTION OF ARCTOMETATARSUS OF ORNITHOMIMOSAURS AND THEIR CURSORIAL ADAPTATION (2017)
  • Author(s): K. Kubo, Y. Kobayashi
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] A CASSOWARY-LIKE CRESTED OVIRAPTORID DINOSAUR (DINOSAURIA: OVIRAPTOROSAURIA) FROM SOUTHERN CHINA (2017)
  • Author(s): J. Lu, M. Kundrat, Y. Kobayashi, Y. Lee, C. Shen, F. Teng
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] A PRELIMINARY REPORT OF UNUSUAL DINOSAUR NESTING GROUND, EASTERN GOBI, MONGOLIA (2017)
  • Author(s): H. Lee, Y. Lee, Y. Kobayashi, K. Tsogtbaatar
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] DINOSAUR ICHNOLOGY AND PALEOENVIRONMENTS FROM THE CHIGNIK FORMATION (ANIAKCHAK NATIONAL MONUMENT, LATE CRETACEOUS, SOUTHWESTERN ALASKA) (2017)
  • Author(s): A. R. Fiorillo, Y. Kobayashi, P. McCarthy, T. Tanaka, R. S. Tykoski
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] DINOSAUR NESTING AT HIGH-LATITUDE: IMPLICATIONS FROM NEST MATERIAL, NEST STRUCTURES, AND INCUBATION HEAT SOURCES (2017)
  • Author(s): K. Tanaka, D. Zelenitsky, F. Therrien, Y. Kobayashi
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] EVOLUTION OF BODY MASS IN THE HESPERORNITHIFORMES (2017)
  • Author(s): T. Tanaka, Y. Kobayashi, T. Tokaryk
  • Organizer: Society of Vertebrate Paleontology
  • Int'l Joint Research
• [Presentation] OSTEOHISTOLOGICAL ONTOGENETIC ASSESSMENT AND PHYLOGENETIC ANALYSIS OF NIPPONOSAURUS SACHALINENSIS (DINOSAURIA, HADROSAURIDAE) (2016)
  • Author(s): Takasaki, R., Chiba, K., Kobayashi, Y., Currie, P. J.
  • Organizer: Scotty of Vertebrate Paleontology
  • Place of Presentation: Salt Lake City (USA)
  • Year and Date: 2016-10-26
• [Presentation] 大分県宇佐市の津房川層（鮮新統）より産出したワニ化石の再検討：最古のヨウスコウワニとその生物地理学的意義 (2016)
  • Author(s): 飯島正也，小林快次，高橋啓一
  • Organizer: 日本古生物学会
  • Place of Presentation: 福井県立大学（福井県吉田郡永平寺町）
  • Year and Date: 2016-06-24
• [Presentation] 最古の潜水鳥類ヘスぺロルニス目における前後肢の相関進化 (2016)
  • Author(s): 田中公教，飯島正也，小林快次，Timothy Tokaryk，Stephen Cumbaa
  • Organizer: 日本古生物学会
  • Place of Presentation: 福井県立大学（福井県吉田郡永平寺町）
  • Year and Date: 2016-06-24
• [Presentation] 恐竜は極域でいかに営巣したか (2016)
  • Author(s): 田中康平，Darla Zelenitsky, Francois Therrien，小林快次
  • Organizer: 日本古生物学会
  • Place of Presentation: 福井県立大学（福井県吉田郡永平寺町）
  • Year and Date: 2016-06-24
• [Presentation] モンゴルの上部白亜系バランシレ層から発見された二指性のテリジノサウルス類 (2016)
  • Author(s): 小林快次，ツクトバアタル・チンゾリグ，キシグジャヴ・ツクトバアタル，リンチェン・バルズボルド
  • Organizer: 日本古生物学会
  • Place of Presentation: 京都大学（京都府京都市）
  • Year and Date: 2016-01-29
• [Presentation] 胃石の形状に基づいた主竜類の食性推定方法の構築 (2016)
  • Author(s): 高崎竜司，小林快次
  • Organizer: 日本古生物学会
  • Place of Presentation: 京都大学（京都府京都市）
  • Year and Date: 2016-01-29
• [Presentation] カナダ・マニトバ州の上部白亜系ピエールシェールから産出した小型のヘスペロルニス科 (2016)
  • Author(s): 田中公教，ディム・トカリク，小林快次
  • Organizer: 日本古生物学会
  • Place of Presentation: 京都大学（京都府京都市）
  • Year and Date: 2016-01-29
• [Presentation] First record of an ornithomimid from the Djadokhta Formation (Campanian) of Togrokiin Shiree, Mongolia (2016)
  • Author(s): Tsogtbaatar Chinzorig, Yoshitsugu Kobayashi, Khishigjav Tsogtbaatar, Mahito Watabe, Rinchen Barsbold, Philip Currie, and Shigeru Suzuki
  • Organizer: 日本古生物学会
  • Place of Presentation: 京都大学（京都府京都市）
  • Year and Date: 2016-01-29
• [Presentation] FIRST ORNITHOMIMID (DINOSAURIA) FROM THE DJADOKHTA FORMATION (CAMPANIAN) OF TUGRIKIN SHIRE, MONGOLIA (2015)
  • Author(s): Chinzorig, T., Kobayashi, Y., Tsogtbaatar, K., Watabe, M., Rinchen, B., Suzuki, S.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] DESMOSTYLIAN REMAINS FROM UNALASKA (USA) (2015)
  • Author(s): Kohno, N., Fiorillo, A. R., Jacobs, L. L., Chiba, K., Kimura, Y., Kobayashi, Y., Nishida, Y., Polcyn, M. J., Tanaka, K.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] A NEW SMALL HESPERORNITHIFORM FROM THE UPPER CRETACEOUS PIERRE SHALE OF MANITOBA (2015)
  • Author(s): Tanaka, T., Tokaryk, T., Kobayashi, Y.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] FIRST RECORD OF A SOMPHOSPONDYLAN SAUROPOD FROM UTAH, AND PALEOECOLOGY OF SAUROPODS IN UTAH DURING THE ALBIAN (2015)
  • Author(s): Yoshida, J., Carpenter, K., Kobayashi, Y.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] TERRESTRIAL VERTEBRATES FROM THE LATE CRETACEOUS (SANTONIAN) OF IWATE PREFECTURE, EASTERN JAPAN (2015)
  • Author(s): Hirayama, R., Takisawa, T., Sasaki, K., Sonoda, T., Yoshida, M., Takekawa, A., Mitsuzuka, S., Kobayashi, Y., Tsuihiji, T., Tsutsumi, Y.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] A NEW THERIZINOSAUR WITH FUNCTIONALLY DIDACTYL HANDS FROM THE BAYANSHIREE FORMATION (CENOMANIANTURONIAN), OMNOGOVI PROVINCE, SOUTHEASTERN MONGOLIA (2015)
  • Author(s): Kobayashi, Y., Chinzorig, T., Tsogtbaatar, K., Barsbold, R.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] A NEW OVIRAPTORID DINOSAUR (DINOSAURIA: OVIRAPTOROSAURIA) FROM THE LATE CRETACEOUS OF SOUTHERN CHINA (2015)
  • Author(s): Lu, J., Chen, R., Kobayashi, Y., Lee, Y.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14
• [Presentation] CONSTRUCTION OF A METHOD TO IMPLY FUNCTION OF GASTROLITHS FROM THEIR FEATURES AND ITS APPLICATION TO THE HERBIVOROUS ORNITHOMIMOSAUR SINORNITHOMIMUS (2015)
  • Author(s): Takasaki, R., Kobayashi, Y.
  • Organizer: Society of Vertebrate Paleontology
  • Place of Presentation: Dallas (USA)
  • Year and Date: 2015-10-14