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Palaeontological study on the fish remains from the Palaeozoic and Mesozoic of Japan.

日本古生代和中生代鱼类遗骸的古生物学研究。

基本信息

批准号：
07640626
负责人：
GOTO Masatoshi
金额：
$ 1.41万
依托单位：
Tsurumi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

1) The Palaeozoic fish remains from Japan are classified into 29 species, that is, one species of Devonian placoderms, 12 species of Carboniferous to Permian elasmobranchs, seven species of Carboniferous to Permian petalodonts, eight species of Carboniferous to Permian cochliodonts and one species of Permian osteichthyans (Goto, 1996 ; 1997).(2) The Mesozoic elasmobranch remains from Japan are classfied into 58 species, that is, three species of Triassic hybodonts, five species of Jurassic hybodonts, and 50 species of Cretaceous hybodontoids, ptychodontoids, chlamydoselachoids, hexanchoids, heterodontoids, lamnoids, squaloids, pristiophoroids and sclerorhynchoids (Goto el al., 1996 ; Goto, 1996).3) Two teeth of Chlamydoselachus sp.are reported from the Izumi Group (Upper Cretaceous) of Sobura, Kaizuka City, Osaka Prefecture and the Himenoura Group (Upper Cretaceous) of Ryugatake, Amakusa-gun, Kumamoto Prefecture (Goto et al., 1996 ; 1997).4) The teeth of Carcharocles from the Godo Formation (Middle Miocene) of Kuzubukuro, Higashi-matsuyama City, Saitama Prefecture are described (Yabe and Goto, 1996).5) The morphology and structure of teeth, dermal denticles and mucous denticles of Megahasma pelagious No.7 * are observed (Goto, 1996, 1997 ; Yano et al., 1997).6) Origin and evolution of tooth and bone of vertebrates are summarized following the evolutionary grade of agnathians, sharks, bony fishes, amphibians, reptiles, mammals and humankind.

1)日本古生代鱼类化石共29种，其中泥盆纪板皮类1种，石炭纪至二叠纪板鳃类12种，石炭纪至二叠纪瓣齿类7种，石炭纪至二叠纪螺齿类8种，二叠纪硬骨鱼类1种（后藤，1996 ; 1997）。(2)日本中生代的板鳃类化石共58种，其中三叠纪的3种，侏罗纪的5种，白垩纪的50种，其中包括：下齿类、褶齿类、厚鳞类、六齿类、异齿类、板齿类、角鲨类、锯鳍类和硬喙类（后藤等人，一九九六年;后藤，1996）。3）在大坂县Kaizuka市Sobura的Izumi群（上白垩统）和熊本县天草郡Ryugatake的Himenoura群（上白垩统）中报道了Chlamydoselachus sp.的两个牙齿（后藤等，一九九六年; 1997年）。4）描述了琦玉县东松山市Kuzubukuro的Godo组（中中新世）的Carcharocles的牙齿（Yabe和后藤，1996年）。5）观察了Megahasma pelagious No.7 * 的牙齿、皮肤牙齿和粘液牙齿的形态和结构（后藤，1996，1997 ; Yano等，6）按照无颌动物、鲨鱼、硬骨鱼、两栖动物、爬行动物、哺乳动物和人类的进化等级，总结了脊椎动物牙齿和骨骼的起源和进化。