| 杨飞虹,王宏元,梁刚.2015.中华大蟾蜍蝌蚪变态过程中肩带与前肢的发育及骨化次序.动物学杂志,50(3):372-380. |
| 中华大蟾蜍蝌蚪变态过程中肩带与前肢的发育及骨化次序 |
| Development and Ossification Sequence of the Pectoral Girdle and Forelimb in Chinese toad（Bufo gargarizans）Tadpoles |
| 投稿时间：2014-10-16 修订日期：2015-04-15 |
| DOI：DOI: 10.13859/j.cjz.201503007 |
| 中文关键词: 中华大蟾蜍 蝌蚪 肩带 前肢 骨化 |
| 英文关键词:Bufo gargarizan Tadpole Pectoral girdle Forelimb Ossify |
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| 中文摘要: |
| 本文采用骨骼双染色法，对中华大蟾蜍（Bufo gargarizans）33 ~ 46期蝌蚪的肩带及前肢骨的发育和骨化次序进行了研究。结果显示，中华大蟾蜍蝌蚪的肩带从36期开始出现，39期通过肌肉与荐前椎Ⅱ、Ⅲ连接，在45期胸骨出现，肩带各结构的出现和骨化起始于肩臼窝邻近的范围；前肢骨出现及骨化的方向是从近端到远端、从轴后到轴前的。肩带和前肢骨的出现有助于缓冲无尾两栖类登陆后运动产生的振动，反映了无尾类蝌蚪在变态过程中由水栖生活到陆栖生活的适应。 |
| 英文摘要: |
| In this study, development and ossification sequence of pectoral girdle and forelimb skeletons of Chinese toad (Bufo gargarizans) tadpole during 33-46 stages were investigated using double staining. The results showed that the pectoral girdle emerged at stage 36, and connected to presacrals Ⅱ, Ⅲ by muscles at stage 39, sternum formed at stage 45 (fig. 1) , chondrification and ossification of pectoral girdle elements began around the glenoid fossa; Emergence and ossification of the forelimb occured in a proximo-distal and postaxial-preaxial direction (fig. 2, fig. 3) . Presence of pectoral girdle and forelimb in anuran alleviate the shock of movement after landing, which reflects the adaption of anuran tadpole transformation from aquatic to terrestrial life in metamorphosis. |
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