湘西花垣中寒武统具表面装饰的管状微体化石

发布时间：2018-07-26 16:27

【摘要】：对采自湘西花垣县排碧剖面中寒武统花桥组灰岩中具表面装饰的磷灰石质管状化石 (Or namentedtubes)进行了研究 ,依据化石的壳面装饰特征 ,建立了 3个形态类型 :OrnamentedTubeFormⅠ ,OrnamentedTubeFormⅡ和OrnamentedTubeFormⅢ。其中Ⅰ型壳体表面装饰有尖细的小刺 ,多数标本壳刺成行排列 ,行间存在宽约 0 0 1～ 0 0 5mm的间隔 ;Ⅱ型管体表面具有零散稀疏而不规则分布的斑疹状壳饰 ,壳体微微向外弯曲的一侧具有一列粗壮的呈锯齿状排列的脊刺 ;Ⅲ型整个壳体表面布满圆形、卵圆形瘤状壳饰 ,壳饰中空 ,与壳体内腔相通 ,壳体微微向外弯曲的一侧具有一列粗壮的呈羽状排列的脊刺。从壳体形态、表面装饰特征分析 ,这类管状化石可能是节肢动物(如高肌虫类 )生物体壳瓣上的前刺或背部的刺等管状硬体构造。
[Abstract]:The fossilized tubular fossils (Or namentedtubes) with surface decoration in the Cambrian Huaqiao group limestone from the PAI Bi section of Huayuan County, Xiangxi, were studied. According to the decorative features of the fossils, 3 types of morphologic types were established: OrnamentedTubeForm I, OrnamentedTubeForm II and OrnamentedTubeForm III. There are fine small spines, most of which are arranged in rows and between rows with a wide interval of about 001 to 00 5mm; the surface of the type II tube has a scattered, irregular, rash shell, and a slightly outward curved side of the shell with a stout serrated spine; the whole shell of type III is full of round surface. A hollow, hollow shell interconnected with the inner cavity of a shell, and a slightly outward curved side of the shell having a stout, pinnate ridge. From the shape of the shell, the surface decoration characteristics are analyzed, and these tubular fossils may be a tubular hard body, such as the front of the arthropods (such as the high muscle worm), or the spines on the back of the back. Structure.
【作者单位】：北京大学地球与空间科学学院地质学系中国科学院南京地质古生物研究所北京大学地球与空间科学学院地质学系
【基金】：国家自然科学基金 (4 0 0 72 0 0 7) 教育部高等学校博士学科点专项科研基金 (2 0 0 0 0 0 0 1 2 7) 中国科学院南京地质古生物研究所开放研究实验室 (0 2 31 0 6 )资助项目
【分类号】：Q914

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