【摘要】 利用透射电镜(TEM)对东海、黄海海域典型站位的微型硅藻进行了研究,观察到我国的一个新记录属——拟脆杆藻属FragilariopsisHustedt。该属的主要特征是:1.细胞以壳面全部或大部分相连成带状群体;2.壳缝靠近壳缘,强烈偏心;3.点条纹数目与船骨点大致相等;4.壳面纵轴通常异极;5.点条纹由两列孔纹组成,很少一列或两列以上的。对该属以及在东海、黄海海域发现的该属的两个种——克氏拟脆杆藻F.kerguelensis(O’Meara)Hustedt和菱形拟脆杆藻F.rhombica(O’Meara)Hustedt进行了较详细的分类特征、生态习性和分布的描述并配有相应的透射电镜照片。更多还原

【Abstract】 A nanodiatom genus, Fragilariopsis Hustedt, is newly recorded in China. This genus is characterized by, (1) cells in ribbons united by the entire or the greater part of the valve surface, (2) raphe strongly eccentric, (3) approximately equal numbers of interstriae and fibule, (4) apical axis often heteropolar, and (5) striae with two rows of poroids, seldom one or more than two. A detailed description of the taxonomic characteristics of the genus is given. The two species distributed in East China Sea and Huanghai Sea of China, F. kerguelensis (O’Meara) Hustedt and F. rhombica (O’Meara) Hustedt, were observed under TEM and photographed.更多还原