摘要
采用扫描电子显微镜(SEM)对湛江地区的丽文蛤(Meretrix lusoria)、琴文蛤(M.lyrata)、文蛤(M.meretrix)、波纹巴非蛤(Paphia undulata)、菲律宾蛤仔(Ruditapes philippinarum)、杂色蛤仔(R.variegata)、伊萨伯雪蛤(Clausinella isobellina)、格粗饰蚶(Anadara clathrata)、泥蚶(Tegillarca granosa)、栉孔扇贝(Chlamys farreri)、尖紫蛤(Sanguinolaria aauta)、锈色朽叶蛤(Coecella turgida)和栉江珧(Atrina pectinata)这6科13种双壳类的贝壳形态微观结构特征进行观察。结果表明,不同种的贝壳表面和横切面微观结构有一定差异。这些差异主要表现在晶体的组成和排列方式两个方面。贝壳角质层根据表面形态特征分为5种类型:光滑平整、颗粒状、不规则多边形、蜂窝状和沟壑状。贝壳棱柱层的晶体形状有棱柱状、短柱状、片状和不规则形状。不同贝壳的晶体有两种排列方向,垂直于横切面和平行于横切面。13种贝壳珍珠层的晶体有颗粒状、砖块状、圆形、块状和不规则的多边形。不同种的贝壳角质层、棱柱层和珍珠层的厚度也不同。研究贝壳微观结构之间的差异,可以为分类提供基本资料。
Research on the shell microstructure was conducted in thirteen species of bivalves which belong to six families using the scanning electron microscopy （SEM）. The 13 species are Meretrix lusoria, M. lyrata, M. meretrix, Paphia undulate, Ruditapes philippinarurn, R. variegate, Clausinella isobellina, Anadara clathrata, Tegillarca granosa, Chlamys farreri, Sanguinolaria aauta, Coecella turgid, and A trina pectinata, respectively. Three samples from each were fixed with 2.5% pentanediol, and then cut into 0.5 cm- 0.5 cm pieces. All sections of small pieces were grinded before observation by scanning electron microscope. Samples were measured and pictures were taken after observation. The results show that the shell surface microstructuresvary in different species, mostly manifested in the composition and arrangement of the crystals. There are five types of shell surface morphologies of the comeum： smooth, granular, irregular polygon, honeycomb-like, and ravine. The crystals of the shell prismatic layer are in prism-like shape, short column, flakes, and irregular shape. There are two kinds of directions in the arrangement of the crystals in different shells： perpendicular to the cross-section, and parallel to the cross-section. The shapes of the crystals in nacre of thirteen kinds of shells are granular, brick-shaped, round, massive and irregular polygons. The thickness of the comeum, prismatic layer or nacre in different shells is also different. Research on the microstructure of the shells may provide a basis for their classification.
出处
《动物学杂志》
CAS
CSCD
北大核心
2015年第1期122-130,共9页
Chinese Journal of Zoology
基金
广东省自然科学基金项目(No.10152404801000013)
关键词
双壳类
贝壳
微观结构
扫描电镜
Bivalve
Shell
Microstructure
Scanning electron microscope
