Development and Ossification Sequence of the Pectoral Girdle and Forelimb in Chinese toad(Bufo gargarizans)Tadpoles
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College of Life Sciences, Shaanxi Normal University,College of Life Sciences, Shaanxi Normal University,

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    Abstract:

    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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YANG Fei-Hong, WANG Hong-Yuan, LIANG Gang. 2015. Development and Ossification Sequence of the Pectoral Girdle and Forelimb in Chinese toad(Bufo gargarizans)Tadpoles. Chinese Journal of Zoology, 50(3): 372-380.

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History
  • Received:October 16,2014
  • Revised:April 15,2015
  • Adopted:April 10,2015
  • Online: May 22,2015
  • Published: