Differentiation and development of testis in the oviparous lizard, Calotes versicolor (Daud.).

The differentiation and development of the testis in the lizard Calotes versicolor was studied histologically and histoenzymatically from the day of oviposition (stage 27) to 2 months after hatching. The study reveals the appearance of the gonadal component as a genital ridge at stage 27. The first sign of testis differentiation is observed at stage 33, which displays a well-developed medulla consisting of seminiferous cords comprising Pre-Sertoli cells.

Histoenzymological studies on embryonic and posthatching development of the ovary in the tropical oviparous lizard, Calotes versicolor.

The development of the ovary in the lizard Calotes versicolor has been studied histologically and histochemically from the day of oviposition (stage 27) to 2 months after hatching. The gonadal component appears as a genital ridge at stage 27. Sex differentiation of gonads occurs at stage 34, which indicates that the period of sexual bipotentiality is very brief.