Morphology and histology of the male reproductive tract of Caecilia thompsoni (AMPHIBIA: GYMNOPHIONA)

摘要: We studied the male reproductive tract of individuals different body sizes Caecilia thompsoni to describe morphological characteristics in comparison other Gymnophiona. The consists paired testes segmented into chains primary and secondary lobes, sperm ducts that empty Wolffian ducts, cloaca receives possesses a phallodeum. Mullerian are present develop glands cloacal urodeum. Testicular lobes contain lobules with cysts entire germinal cell line, whereas terminal ends chains, only have spermagonia, Sertoli cells, connective tissue. smallest individual examined (21 cm length) was immature possessed few testicular lobes. Once reach sexual maturity, quite consistent at macroscopic histological level among males very sizes. features suggest complementary secretory role between two ducts. In we found propulsor muscle, venous sinuses, blind sacs phallodeum, which differentiate C. from species genus. Despite these slight differences, general characteristics, both microscopic, tracts adult follow pattern known for reproductively active