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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
基金项目:
作者单位E-mail
杨飞虹 陕西师范大学生命科学学院 feihong_yang@163.com 
王宏元 陕西师范大学生命科学学院 西安 710119  
梁刚 陕西师范大学生命科学学院 lianggang@snnu.edu.cn 
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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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