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的皮甲：皮甲是在日本中部岐阜县Kmitakara-mura的Hukuji发现的。从形态学和组织学研究，推测皮甲为Romudina sp.的棘板，2.古生代软骨鱼类的牙齿：Petalodus allegheniensis的牙齿？Chomatodus sp.和？Janassa sp.，P. a.和中二叠统Sandlodus sp.的化石.中生代板鳃亚纲的牙齿：研究了日本中三叠世的Hybodus sp.、上三叠世的Acrodus sp.和下侏罗世的Asteracanthus sp.的牙齿.第三纪Elasmoblanchii的牙列修复：在富山科学博物馆修复了Carcharocles megalodon的颌骨和牙列。描述了产于斐井县中新世的两颗Isurus牙齿。软骨鱼类牙齿的演化：对化石和现存软骨鱼类牙齿的形态和组织学进行了研究。可以认为，软骨鱼类的牙齿结构并不依赖于它们的进化水平，而是适应它们的饮食习惯的结果。

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）

中川 登美雄・後藤 仁敏: "福井県北部の中新統から産出したアオザメ属の歯化石について" 福井市立郷土自然科学博物館研究告. 37号. 1-6 (1990)

中川富夫和后藤仁俊：“关于福井县北部中新世时期的灰鲭属牙齿化石”福井市自然科学研究馆公报第37. 1-6号（1990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。”