Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis

doi:10.1016/j.cretres.2025.106197

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	Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis
	Tai, Kubo 1,2; Usami, Kodai 2; Hirayama, Ren 3; Iijima, Masaya 2,4; Winkler, Daniela E.2,5; Ito, Ai 6; Uno, Hikaru 7; Miyata, Shinya 8; Kubo, Mugino O.2
	2025-12-01
发表期刊	CRETACEOUS RESEARCH
ISSN	0195-6671
卷号	176 页码:16
通讯作者	Tai, Kubo(taikubo@aoni.waseda.jp)
摘要	Here we describe recently recovered crocodyliform remains from the Tamagawa Formation of Kuji Group, Kuji city, northeastern Japan. The material comprises osteoderms, vertebrae, a frontal bone, and isolated teeth. The dorsal paravertebral osteoderms bear a sagittal keel on the posterior half of the element, extending to its caudal margin, which indicates the presence of paralligatorids within the Kuji crocodyliform assemblage. Further, the Kuji crocodyliform assemblage may have consisted of multiple taxa, as the frontal bone lacks the sagittal keel characteristic of paralligatorids. Contemporaneous paralligatorids have been reported from Northeastern China, Mongolia, and Uzbekistan. The discovery of a potential paralligatorid from Kuji, Japan, suggests that paralligatorids were widely distributed across Asia, from coastal to inland regions, during the Late Cretaceous. Furthermore, potential diets of taxa included in the crocodyliform assemblage from Kuji were estimated through dental microwear texture analysis. The dental microwear texture observed in Kuji specimens is distinct from that of piscivorous and small crocodylians (skull length <20 cm), while comparable to that of large crocodylians consuming hard-objects (skull length >20 cm). Considering the existence of a medium-sized species (3 m total length) in the crocodyliform assemblage from Kuji, their diet probably included mid to large sized tetrapods, such as turtles and dinosaurs. (c) 2025 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
关键词	Dental microwear texture analysis Paralligatoridae Kuji group Japan Upper Cretaceous
DOI	10.1016/j.cretres.2025.106197
关键词[WOS]	PHYLOGENETIC POSITION ; FOOD-HABITS ; ANATOMY ; REPTILE ; ARCHOSAURIA ; MORPHOLOGY ; NILOTICUS ; EVOLUTION ; REVISION ; CHINA
收录类别	SCI
语种	英语
资助项目	Japan Society for the Promotion of Science[22K19339]
项目资助者	Japan Society for the Promotion of Science
WOS研究方向	Geology ; Paleontology
WOS类目	Geology ; Paleontology
WOS记录号	WOS:001540687900001
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24825
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Tai, Kubo
作者单位	1.Waseda Univ, Ctr Data Sci, Nishiwaseda 1-6-1,Shinjuku Ku, Tokyo 1698050, Japan 2.Univ Tokyo, Grad Sch Frontier Sci, Dept Nat Environm Studies, Chiba, Japan 3.Waseda Univ, Sch Int Liberal Studies, Nishiwaseda 1-6-1,Shinjuku Ku, Tokyo 1698050, Japan 4.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 5.Univ Kiel, Zool Inst, Kiel, Germany 6.Univ Tokyo, Univ Museum, Hongo 7-3-1,Bunkyo Ku, Tokyo 1130033, Japan 7.Waseda Univ, Res Inst Sci & Engn, Ookubo 3-4-1,Shinjuku Ku, Tokyo 1698555, Japan 8.Josai Univ Educ Corp, Oishi Fossil Gallery Mizuta Mem Museum, 2-3-20 Hirakawa Cho,Chiyoda Ku, Tokyo 10210093, Japan
推荐引用方式 GB/T 7714	Tai, Kubo,Usami, Kodai,Hirayama, Ren,et al. Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis[J]. CRETACEOUS RESEARCH,2025,176:16.
APA	Tai, Kubo.,Usami, Kodai.,Hirayama, Ren.,Iijima, Masaya.,Winkler, Daniela E..,...&Kubo, Mugino O..(2025).Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis.CRETACEOUS RESEARCH,176,16.
MLA	Tai, Kubo,et al."Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis".CRETACEOUS RESEARCH 176(2025):16.