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1 March 2001 Ultrastructure of the Testis of the Mexican Fruit Fly (Diptera: Tephritidae)
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Abstract

The testis of Anastrepha ludens (Loew) has a special histological structure, which is different from the basic morphological arrangement. The organ consists of a single saclike follicle containing all the development zones of male sexual cells. The base of the follicle is modified as a seminal vesicle where spermatozoa mature. In the testis wall there is a peritoneal sheath of large cells, closely associated with tracheoles. The main feature of these cells is a cytoplasm full of pigment grains. The peritoneum is located on a continuous layer of muscles, not previously reported in insect morphology. There is an apical follicular epithelium supported by a thick basement membrane, and an epithelium at the base of the testis forming a chamber where the spermatozoa are released from the cysts. Most of the mature spermatozoa are inside deep folds of the basal epithelium cells.

Jorge M. Valdez "Ultrastructure of the Testis of the Mexican Fruit Fly (Diptera: Tephritidae)," Annals of the Entomological Society of America 94(2), 251-256, (1 March 2001). https://doi.org/10.1603/0013-8746(2001)094[0251:UOTTOT]2.0.CO;2
Received: 24 July 2000; Accepted: 1 November 2000; Published: 1 March 2001
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