Paleontological Study on Dermal Armor, Dermal Tooth and Tooth of Primitive Fishes.

原始鱼类的皮甲、皮齿和牙齿的古生物学研究。

• 批准号: 01540647
• 负责人: GOTO Masatoshi
• 金额: $ 0.7万
• 依托单位: Tsurumi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01540647/
• 关键词: Placodermi; Chondrichthyes; Elasmobranchii; Dermal armor; Tooth; Dentine; Morphology; Histology; 真正象牙質; 骨様象牙質; 皺襞象牙質; 全頭類; ヒボドゥス上科; ペタロダス類; コクリオダス類; エデスツス類; カルカロドン

1. Dermal armor of Placodermi : The dermal armors were discovered from the Hukuji Group (Lower Devonian) in Hukuji, Kmitakara-mura, Gifu Prefecture, central Japan. From the morphological and histological studies, the dermal armor is presumed as spinal plates of Romudina sp., Acanthothoraci.2. Tooth of Paleozoic Chondrichthyes : Teeth of Petalodus allegheniensis, ?Chomatodus sp. and ?Janassa sp. from the Middle Carboniferous, P. a. from the Lower Permian and Sandlodus sp. from the Middle Permian of central Japan were investigated.3. Tooth of Mesozoic Elasmobranchii : Teeth of Hybodus sp. from the Middle Triassic, Acrodus sp. from the Upper Triassic and Asteracanthus sp. from the Lower Jurassic of Japan were investigated.4. Restoration of dentition of Tertiary Elasmoblanchii : The jaws and dentition of Carcharocles megalodon were restored in the Toyama Science Museum. Two teeth of the genus Isurus from the Miocene of Fikui Prefecture were described.5. Evolution of tooth in Chondrichthyes : The morphology and histology of teeth in fossil and extant Chondrichthyes were investigated. It can be considered that the tooth structure of Chondrichthyes is not dependent on their evolutionary levels, but the result of an adaptation to their food habits.

1。Placodermi的皮肤装甲：皮肤装甲是从日本中部Gifu县Kmitakara-Mura的Hukuji的Hukuji Group（Lower Devonian）发现的。从形态学和组织学研究中，真皮盔甲被假定为Romudina sp。的脊柱板，Acanthothoraci.2。古生代的牙齿牙齿：petalodus allegheniensis的牙齿，？chomatodus sp。和janassa sp。来自中石炭纪的P. a。从下二叠纪和Sandlodus sp。研究了日本中部的中二叠纪。3。中生代弹性的牙齿：hybodus sp的牙齿。来自中部三叠纪，Acrodus sp。来自上三叠纪和asteracanthus sp。从日本的下层侏罗纪进行了研究。4。修复三级弹性牙齿的牙列：在富山科学博物馆中恢复了大麻和牙本质的牙齿。描述了来自Fikui县中新世的Isurus属的两个牙齿。5。软骨中的牙齿的进化：研究了化石和现存软骨的牙齿的形态和组织学。可以认为，软骨的牙齿结构并不取决于其进化水平，而是适应食物习惯的结果。

项目成果

Goto, Masatoshi: "A restoration of the jaws of the giant extinct shark, Carchalocles (Carharodon) megalodon." Journal of Fossil Research. vol. 22. 7-13 (1989)

后藤正俊：“已灭绝的巨型鲨鱼——Carchalocles（Carharodon）巨齿鲨的下颌的修复。”

古生代魚類化石研究グル-プ: "古生代魚類化石のカラ-写真展" 地学団体研究会第43回総会資料集. 283-284 (1989)

古生代鱼类化石研究组：《古生代鱼类化石彩色照片展》地球科学会研究组第43次大会资料283-284（1989）。

後藤仁敏: "古生代軟骨魚エデスツスの正中歯列" 地球科学. 44. (1990)

Hitotoshi Goto：“古生代软骨鱼Edestus的中牙列”地球科学44。（1990）

柴谷 篤弘・長野 敬・養老 猛司・後藤 仁敏ほか: "講座 進化IV.形態学からみた進化" 東京大学出版会, (1991)

Atsuhiro Shibatani、Takashi Nagano、Takeshi Yoro、Hitotoshi Goto 等：《进化讲座 IV. 从形态学角度看进化》东京大学出版社，（1991 年）

Goto, M., Kuga, N. and Hachiya, K: "On the hybodont elasmobranch teeth of three genera from the Mesozoic in Japan." Jour. Geol. Soc. Japan. vol. 97. (1991)

Goto, M.、Kuga, N. 和 Hachiya, K：“关于日本中生代三个属的软骨鱼属的牙齿。”