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Histology of vitamin A induced ectopic limbs and normal hind limbs in tadpoles of Polypedates maculatus.

Marked histological similarities were observed between normal and vitamin A induced ectopic limb buds of P. maculatus. However, close association of nephric tubule and lateral plate mesoderm, as seen in normal hind limb bud does not seem to be essential for ectopic limb development. The ectopic limbs tend to develop in pairs.