云南曲靖下泥盆统洛霍考夫阶花鳞鱼类新材料

摘要：

采用高精度计算机断层扫描和三维重建技术,获取了大量来自云南下泥盆统洛霍考夫阶西屯组和西山村组下部花鳞鱼鳞片的三维重建模型。描述了花鳞鱼类的一个已知属——副花鳞鱼属(Parathelodus)的共7个种,三裂副花鳞鱼(P. trilobatus)、亚洲副花鳞鱼(P. asiaticus)、角状副花鳞鱼(P. cornuformis)、雅致副花鳞鱼(P. scitulus)、西屯副花鳞鱼(新种) (P. xitunensis sp. nov.)、王氏副花鳞鱼(新种) (P. wangi sp. nov.)和寥廓副花鳞鱼(新种) (P. liaokuoensis sp. nov.)。新材料的发现将副花鳞鱼的地层分布从洛霍考夫阶西屯组至西山村组上部延伸到西山村组下部,最低层位已非常靠近志留系与泥盆系的界线。西屯副花鳞鱼、王氏副花鳞鱼和廖廓副花鳞鱼3个新种的发现提高了我们对中国早泥盆世花鳞鱼类多样性的认识。

关键词: 云南曲靖, 下泥盆统洛霍考夫阶, 花鳞鱼类, 高精度计算机断层扫描, 三维重建

Abstract:

We reconstructed a wealth of three-dimensional virtual models of vertebrate micro-remains from the Xitun Formation and lower part of the Xishancun Formation (Lochkovian, Lower Devonian) of Qujing, Yunnan by means of high-resolution computed tomography. One genus (Parathelodus) and seven species (P. trilobatus, P. asiaticus, P. cornuformis, P. scitulus, P. xitunensis sp. nov., P. wangi sp. nov. and P. liaokuoensis sp. nov.) of thelodonts are described. The new discovery extends the stratigraphic distribution of Parathelodus from the Xitun Formation and the upper part of the Xishancun Formation to the lower part of the Xishancun Formation, the horizon close to the Silurian-Devonian boundary. The three new species, P. xitunensis, P. wangi and P. liaokuoensis, enhance our knowledge of the thelodont diversity from the Early Devonian of China.

Key words: Qujing, Yunnan, China, Lochkovian, Lower Devonian, thelodonts, high-resolution computed tomography, three-dimensional reconstruction

中图分类号: 

Q915.861

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