对滇东会泽雨碌、寻甸摆宰早寒武世梅树村期软舌螺壳质微细结构的研究表明，软舌螺壳的孔沟系统十分发育，壳的外层由分叉与合并呈纵向排列的长纤束组成，内层由横向分布的粒柬组成。在外层纤柬之间和纤柬内分布有大量的三角形或长椭圆形的孔洞，这些孔洞的长轴平行于壳的生长方向；在内层粒束之间或粒柬内有横向分布的长沟。内外层的沟孔可以相通。在一些软舌螺纵向和横向的切片中，均发现早期磷酸岩化作用中已被磷质颗粒充填的孔沟形态，这些孔沟分布相当密集，基本垂直壳面，几乎通达壳壁的顶底。多孔性的壳既反映了软舌螺对其特殊的生理和生态功能的要求，也反映了早期带壳动物的原始性和它们在早期生物矿化作用中的特殊地位。

Research on microstructures of some slices and a well preserved hyolith conch from the Early Cambrian Meishucunian of the Yulu, Huize County and Baizai, Xundian County of eastern Yunnan shows that hyolith tubular pore system is well developed. Outer layer of the conch consists of longitudinal long fibre bundles that can branch and anamonse while inner layer of the conch transversal elongated bundles. A lot of triangular or elliptical pores are distributed in the outer layer. These pores are parallel to growth direction of the conch. Transversal long channels are distributed in and between bundles of the inner layer. Tubular pores of the outer and inner layers can be connected. In some slices of hyoliths the tubular pores that were filled with phosphate granules in the process of the early phosphatization can be recognized. These tubular pores are densely distributed. They are approximately perpendicular to shell surface and almost reach to surface and bottom of the conch. The porosity of hyolith conch reflects not only special physiological and ecological function of the hyoliths to environment but also one of its primitive features and its special position in the early biomineranization.

Q915.6

国家重点基础研究发展规划项目 (G2 0 0 0 0 7770 0 )，国家攀登计划专项 (攀 95 专 0 1)，中国科学院知识创新工程重要方向项目 (KZCX2 116)资助课题