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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/11323

Title: Ultrastructure of germaria and vitellaria in Dugesia sicula Lepori, 1948 (Platyhelminthes, Tricladida, Paludicola)
Authors: Charni, Mohamed
Ben Ammar, Aouatef
Habib Jaafoura, Mohamed
Zghal, Fathia
Tekaya, Saïda
Issue Date: 2010
Publisher: Koninklijke Belgische Vereniging voor Dierkunde - Société Royale Zoologique de Belgique
Citation: Belgian Journal of Zoology, 140 (Suppl.). p. 111-118
Abstract: The female gonad of the diploid and sexual planarian Dugesia sicula Lepori, 1948 has been studied by means of transmission electron microscopy (TEM). The germaria consist of two ovaries occurring in the anterior body part behind the eyes. The vitellaria are composed of two lateral rows of vitelline follicles ranged dorsally and ventrally from the ovaries to the copulatory apparatus. During their growth, oocytes are provided with scattered residual yolk globules. The cytoplasm of maturing oocytes is filled with mitochondria, chromatoid bodies, Golgi complexes, RER, annulate lamellae and small yolk globules (2-3 μm in diameter) surrounded by a simple membrane, and lacks cortical granules. During the early stage of differentiation, vitellocytes enclose well-developed RER and Golgi complexes. Mature vitellocytes show yolk and eggshell globules, lipid droplets and glycogen particles. Golgi complexes and RER are involved in the production of eggshell and yolk globules respectively. Eggshell globules exhibit a concentric pattern typical for triclads. Results are discussed and compared with bibliographic data for other triclads.
Notes: Université de Tunis El-Manar, Faculté des Sciences, Campus Universitaire, 2092 El-Manar Tunis, Tunisie. Service commun pour la recherche en microscopie électronique à transmission. Faculté de Médecine de Tunis, 15, Rue Djebel Lakhdar La Rabta, 1007 Tunis, Tunisie. Corresponding author: Mohamed Charni; e-mail: Mohamed.Charni@fst.rnu.tn
URI: http://hdl.handle.net/1942/11323
ISSN: 0777-6276
Category: A1
Type: Journal Contribution
Appears in Collections: Eleventh International Symposium on Flatworm Biology

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