Mendeley出力
＜紀要論文＞
三畳系美祢層群より産出したLingula属腕足類
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| 概要 | A large number of Lingula specimens were discriminated from the Norian Kamonosho Formation of the Triassic Mine Group, distributed in the Asa area, Yamaguchi Prefecture. About a hundred and sixty spec...imens are applied for special use of investigation. Based on the litho-and biofacies of the Lingula-bearing beds, namely the fine black siltstones in association with fine fragments of plants, framboidal pyrites, and frequent occurrence of articulated valves, and a histogram on the size distribution of the collected materials, it is highly possible that the Lingula specimens show neraly autochthonous in occurrence. Among the known species of the Triassic Lingula twelve species are compared with the present form based on the original descriptions and figures. It is confirmed that the present species is closely related to L. lindstromi described by Bohm (1912) from the Lower Triassic Ladinian of Spitzbergen in external characters. However, it became apparent that the internal characters are also very important for distinguishing the Lingula species. The present species is provisionally referred to Lingula aff. Lindstromi Bohm.続きを見る |
| 目次 | I．はじめに II. Lingula化石産地の地質概略 III. 化石の産状 IV. 鴨庄層産Lingula化石に関する考察 V. むすび |
詳細
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| 登録日 | 2021.10.15 |
| 更新日 | 2022.06.20 |