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）古生代鱼类的残留物分为29种，即一种泥盆纪的placoderms，12种石炭纪至普罗斯多的弹性弹性，七种石炭纪的石炭纪二叠纪花盆，八种二叠纪的石炭纪，二叠纪的二叠纪cochliodonts和一种种类二叠纪osteichthyans（Goto，1996; 1997）。（2）中生代的弹性分支遗体从日本分类为58种，即三种三叠纪的三叠纪水，五种，五种侏罗纪的侏罗纪源自，六角形，异端t，lamnoids，squaloids，pristiophoroids和sclerorhynchoids（Goto el al。，1996; Goto，1996）.3）两齿的chlammydoselachus sp.ARE报告了Izumi Group（sobura of Crebura，Kaizizuka City，kaaizuka City，osaka，kaaizizuka citha，kaaizizuka citer，kaaizuka citha，kaaizizuka citha s s osaka Ryugatake，Amakusa-Gun，Kumamoto县的县和Himenoura Group（上白垩统）描述了Saitama县（Yabe and Goto，1996）.5）牙齿的形态和结构，真皮齿状牙齿和巨质齿7 * *的粘膜牙齿 *（Goto，1996，1997; Yano等，1997）.6）脊椎动物的牙齿和骨头的起源和进化是在Agnathians，鲨鱼，骨鱼，两栖鱼类，两栖动物，爬行动物，哺乳动物和人类的进化级后总结的。