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- 後藤 仁敏
- 東京支部:東京医科歯科大学歯学部第二口腔解剖学教室
書誌事項
- タイトル別名
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- New find of the Permian and Triassic fish Fossils in Japan : On the dermal denticles and teeth of fishes discovered from Karasawa area, southeast Asio Mountains
- ホンポウ ノ ペルムケイ オヨビ 3ジョウケイ カラ ノ ギョルイ カセキグン
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説明
Many fossil teeth and scales of fishes have been discovered from Japanese Permian and Triassic. The locality is Karasawa area, southeast Asic Mountains, and the horizon is black limestone stratum of Nabeyama formation (middle Permian; and laminated limestone stratum of Adoyama formation (Ladinian to early Carnian, Triassic; (Conodont Research Group, 1974). These fossils are found by the extraction of conodonts, associated with sponge spines, radiolaria and foraminifera, The writer observed these fossils by scanning electron microscope (Plate I). They consist of dermal denticles (placoid scales) of sharks and teeth and spines of fishes. The former indicates general morphology of dermal denticle of sharks which has three cusped crown (Fig. 1, 2). The latter includes various types, that is, lower coneshaped type (Fig. 4, 5), higher cone-shaped type (Fig. 7), type which has plication or striation on its crown surface (Fig. 10, 11) and dental plate type on which many teeth arrange alternately (Fig. 12). In addition to them, he observed a specimen which shows teeth-like structure on the longitudinal secticn(Fig. 8, 9). It is considered that these fish fossils will be one of the most important materials for the paleontological studies on the Paleozoic and Mesozoic vertebrates in Japan.
収録刊行物
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- 地球科学
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地球科学 29 (2), 72-74a, 1975
地学団体研究会
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詳細情報 詳細情報について
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- CRID
- 1390282679242001152
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- NII論文ID
- 110007090562
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- NII書誌ID
- AN00141269
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- ISSN
- 21897212
- 03666611
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- NDL書誌ID
- 1592696
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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