Histochemical observations on the granulosa (follicular) cells in the preovulatory and postovulatory follicles of garden lizard ovary

Varma, Santosh K.; Guraya, Sardul S.

doi:10.1159/000144096

Cited by 6 publications

(1 citation statement)

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“…In C. versicolor the atresia of mature vitellogenic follicles is rare (Varma, ). In Bungarus caeruleus (Schneider, 1801) (Guraya, ), C. versicolor (Varma & Guraya, ) and Hemidactylus flaviviridis Rüppel, 1835 (Guraya & Varma, ) follicular atresia occurs especially in follicles with polymorphic granulosa. This has been observed in T. catalanensis , in which it is recorded at advanced stages of previtellogenesis.…”

Section: Discussionmentioning

confidence: 99%

Development and differentiation of the reproductive system of Tropidurus catalanensis (Squamata: Tropiduridae)

Delssin

Sandoval

Ortiz

et al. 2019

Journal of Morphology

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Development and differentiation of the reproductive system in lizards begin in the embryonic period, although the stage and time of their occurrence vary according to populations and species. In this study, the events of the development and differentiation of the reproductive system of males and females of Tropidurus catalanensis were characterized during the embryonic, neonatal, and juvenile periods. Embryos at Stages 27, 34, 37, 40, and 41, neonates and juveniles, from Corrientes, Argentina, were analyzed. At Stage 27, the genital ridge was not observed but primordial germ cells were recorded in the yolk sac as well as the mesenteric mesenchyme, indicating the beginning of germ cell migration. Gonadal differentiation commenced at Stage 34. In males from Stage 37, the testes possessed seminiferous cords with Sertoli cells and spermatogonia, while in hatchlings seminiferous tubules and interstitial tissue with mature Leydig cells were present. Spermatogenesis was observed in a specimen of 51.9 mm snout-vent length, corresponding to the minimum reproductive size. In females, from Stage 37 until hatching, the ovaries had a cavernous medulla and a cortex with somatic cells and abundant oogonia. The onset of meiosis and folliculogenesis occurred in the juvenile period.

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Section: Discussionmentioning

confidence: 99%