| 罗平生物群化石类型在云南泸西地区的发现及其意义 |
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| 引用本文： | 文芠,张启跃,胡世学,周长勇,黄金元,马志鑫,闵筱.罗平生物群化石类型在云南泸西地区的发现及其意义[J].地球科学,2020,45(8):3094-3103. |
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| 作者姓名： | 文芠 张启跃 胡世学 周长勇 黄金元 马志鑫 闵筱 |
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| 作者单位： | 1.中国地质调查局成都地质调查中心, 四川成都 610081 |
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| 基金项目： | 国家自然科学基金面上项目41772022国家自然科学基金面上项目41661134047中国地质调查局项目DD20160020中国地质调查局项目DD20190054 |
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| 摘 要： | 罗平生物群是我国著名的三叠纪海相生物群，时代为中三叠世安尼期Pelsonian亚期，主要分布在云南罗平县城周围大洼子、九光村等地.在泸西地区中三叠统关岭组二段发现了海生爬行类、鱼类、节肢动物、棘皮动物、软体动物、腕足动物、植物等罗平生物群化石类型，初步研究显示泸西地区罗平生物群化石构成面貌与罗平基本一致，但新发现的盾鳞化石是罗平生物群层位软骨鱼类的首次报道.在泸西白水塘中三叠统关岭组二段剖面中识别出了Nicoraella germanicus、Nicoraella cf.kockeli和Neogondolella? bifurcata等牙形石类型，构成面貌特征表明其归属于中三叠世安尼期Pelsonian亚期，与罗平地区地层时代相当.泸西地区罗平生物群化石的发现扩大了罗平生物群的分布范围，其中新发现的盾鳞化石为研究华南中三叠世软骨鱼类提供了新材料.
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| 关 键 词： | 中三叠世 牙形石 盾鳞化石 罗平生物群 泸西县 古生物学 |
| 收稿时间： | 2020-03-19 |
New Occurrence and Significance of Middle Triassic Luoping Biota from Luxi County,Yunnan Province |
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| Abstract: | The Luoping Biota is a famous Triassic marine fossil Lagerst?tten in the world, and its age is assigned to Pelsonian, Anisian, Middle Triassic. Previously the fossils of the Luoping Biota were reported only from the area around the Dawazi, Jiuguang villages in the Luoping County. Here it reports the discovery of abundant fossils, including marine reptiles, fishes, athropods, echinoderms, mollusks and plants from Member Ⅱ of the Guanling Formation in Luxi County, Yunnan Province. The fossil assemblage in Luxi County is similar to that of the Luoping Biota. However, the placoid scales found in Luxi represent the first report of Chondrichthyes from the Luoping Biota. Conodont Nicoraella germanicus, Nicoraella cf. kockeli and Neogondolella? bifurcate, were recognized from the Baishuitang section, indicating an age of Plesonian, Anisian, Middle Triassic, which is equal to that of Luoping Biota. The fossil locality found in Luxi is of great significance in understanding the spatial distribution of the Luoping Biota. This work also provides new materials for studying the Middle Triassic Chondrichthyes in South China. |
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