Ultrastructure study of the diatom──Ⅱ．Synedra，Cyclophora，Plagiogramma，Opephora，Fragilaria and Pseudostaurosira

Six genera and thirteen species of diatoms are collected from the intertidal zone of Xisha Islands,Hainan Province, and observated under the transmitted light microscopy (LM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). of them, four new species, and one genus are newly recorded (marked).They are: Synedra cyclophoroides sp. nov., Cycolophora tenuis, Plagiogramma parva sp. nov., Plagiogramme pandurata sp. nov., P. atomus, P. reimeri, Opephora elliptica sp. nov. O. martyi, O. olsenii,O. sp. Fragilaria brevistriata v. elliptica; F. construens and Pseudostaurosira brevistriata.

大兴安岭地区硅藻中国新记录

报道了采自中国大兴安岭地区的中心类及无壳缝类硅藻植物5属9种,其中含3个中国新记录种:正链藻属的角状正链藻Orthoseira roeseana(Rabenhorst)O'Meara、脆杆藻属的古拉德脆杆藻Fragilaria goulardii(Brébisson)Lange-Bertalot和菱形脆杆藻Fragilaria nitzschioides Grunow。对国内文献报道较少的正链藻属、假十字形藻属、类十字形藻属、十字形藻属植物的形态特征进行了描述;对9种硅藻植物的分类特征及生态分布特点进行了描述。