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A PRELIMINARY OBSERVATION ON THE EMDNBYONIC DEVELOPMENT OF Radix auricularia
Wen Zhang, Xue Hongling, Yunzhi Wang, Ge Muxiang, Zhang Fubin
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Abstract
This paper deals with the embryonic development of Radix auricularia The embryonic development stages were discontinuously observed and the specimens were collected once two hours or eight hours According to the external morphology, whole developmental course of the embryo can be divided into 7 stages as follows: cleavage stage, blastula stage, gastrula stage, trochophore stage, veliger stage, juvenile snail forming stage, hatching stage The paper describes the appearance feature of each stage and the time of the embryonic development of Radix auricularia and draws their forms