【摘要】 报道了沼水蛙的早期胚胎发育过程。根据胚胎发育过程中的形态变化规律将胚胎发育过程分为2 5个时期 ,在室温 (2 4± 1 )℃的条件下 ,胚胎发育历时 1 87h 5 4min ;在室外不控制温度 ,气温为 1 8～ 2 5℃的条件下 ,历时 2 1 5h 3 0min。本文还描述了各时期的形态特征 ,并讨论了发育中的一些现象。更多还原

【Abstract】 The early embryonic development in Hylarana guentheri was investigated. The course of embryonic development, from its fertilized egg to the completion of operculum, is divided into 25 stages, which took 187 hours 54 minutes under the indoor temperature of (24±1)℃ and 215 hours 30 minutes under the natural condition of 18～25℃ temperature outside. The external morphological characteristics in every stages of the embryonic development in Hylarana guentheri were similar to Rana heckscheri. The hatching time was intensively occurred before heart beating stage.更多还原