摘要
中国对虾平衡囊位于第一触角底节基部中央,其背面有背孔与外界相通;平衡囊背壁钙化,腹壁几丁质并凹下成囊泡状,平衡囊壁长出两类刚毛(钩状刚毛与直立刚毛),托着许多沙粒作为平衡石;平衡囊神经三束,从脑神经节的视神经腹侧面发出,感觉神经元为双极细胞,每个感觉神经元轴突与平衡囊神经相联,树突则伸入感觉刚毛的壶腹。
The statocyst of Penaeus chinensis was situated within the center basal region of the first antennular segment.It was in communication with exterior through a median slit.The dorsal wall of the statocyst was calcified and the ventral wall of the statocyst was an invaginat-ing vesicle,which composed of chitin There were two types of setae (the hook-like and straight seta) growing out of the wall of statocyst,and much sand grains acting as statoliths.Three bundles statocyst nerves came from the brain,latero-ventral to the optic nerve.The sensory neuron was a bipolar cell.Each of bipolar cell body gave rise to an axon,that extended centrally to join the statocyst nerve,and a dendrite,that passed into the ampulla of the sensory hairs.
基金
国家自然科学基金
关键词
中国对虾
平衡囊
第一触角
Penaeus Chinensis,antcnnule
statocyst
