一种不运动的淡水甲藻的形态学和生活史观察

MORPHOLOGY AND LIFE HISTORY OF AN IMMOBILE FRESHWATER DINOPHYCEAOUS ALGA

作者在湖北省武汉市一腐殖质丰富的小水泥池中发现了一种能形成水华的甲藻，经鉴定为巴达维亚胞甲藻，属植甲藻目，此目是中国新记录。通过野外观察和室内培养，对其形态学和生活史进行了研究。其营养细胞近新月形，腹部轻微隆起；每个细胞产生两个裸甲藻型的动孢子，动孢子再直接发育成一个新个体；环境不适时可形成静孢子或胞囊（Cyst）；静孢子近球形，由营养细胞收缩形成；球形的胞囊由原生质发育而来，位于母细胞壁内，外壁具“环形山”状的附属物。此种的胞囊为首次发现。

An immobile freshwater dinophyceaous alga Cystodinium balaviense Klebs belonging to Phytodinales was found in a little humus pool from Hubei province,China. This order is new to China. The morphology and life history are described from the fleld and laboratory materials. The vegetative cell of C. bataviense is near lunate, the division of one cell results in tWo zoospores. Aplanospore or cyst will form when environment is rough. Aplanospore is globular, it's found from a vegetative cell by itS shrinkage. Cyst is derived from the protoplast of a mother cell,its outer wall ornament with many appendages like some 'annular mountains'. The cyst of C. bataviense is first reported for this genus.