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- 鈴木 雄太郎
- 静岡大学理学部生物地球環境科学科
書誌事項
- タイトル別名
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- Review of researches on trilobites, and history of trilobite diversity under the Palaeozoic environment
- サンヨウチュウ ケンキュウ ノ ソウセツ オヨビ タヨウセイ ノ ヘンセン
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This paper reviews researches on trilobites and history of trilobite diversity under the Paleozoic environment. First, the studies on exoskeletal morphology, its chemical compositions and internal organs are reviewed. Second, a systematic outline of classification on the Trilobita and its bearing taxonomic problems such as these of agnostids and naraoids are discussed based on previous studies focused into the aspect of functional morphology. The life history of trilobites are divided into three major periods of the initial (early Cambrian), radiative (Cambrian to Ordovician) and declining stages (Silulian to Permian), respectively. Dominated carbonate ramp-settings under the condition of sea-level fluctuation are favored to be one of the most important factors that influenced the history of the morphological and the taxonomic diversity in the initial stage. Increased morphological diversity occurred in the radiative stage, corresponding to the period of widely expanded carbonate depositional settings, especially of reefal facies. In case of the declined stage, sea-level lowering during the mid Silurian to the earliest Devonian and the late Devonian extinction event is favored as the main factors to explain the trend of the declined and low morphological diversity. An additional factor to this may be the switch of the aragonite/calcite sea water which happened in the middle Carboniferous.
収録刊行物
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- 化石
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化石 72 (0), 21-38, 2002
日本古生物学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390001204434453504
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- NII論文ID
- 110002704278
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- NII書誌ID
- AN00041606
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- ISSN
- 24242632
- 00229202
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- NDL書誌ID
- 6307661
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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
- IRDB
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可