0157614 - PAU-O 20033001 RIV DE eng J - Journal Article
Bruňanská, Magdaléna - Nebesářová, Jana - Scholz, Tomáš
Ultrastructure of the spermatozoon of the proteocephalidean cestode Proteocephalus torulosus (Batsch, 1786).
Parasitology Research. Roč. 89, č. 5 (2003), s. 345-351. ISSN 0932-0113. E-ISSN 1432-1955
R&D Projects: GA ČR GA524/01/1314
Institutional research plan: CEZ:AV0Z6022909
Keywords : cestoda * spermatozoon * ultrastructure
Subject RIV: GJ - Animal Vermins ; Diseases, Veterinary Medicine
Impact factor: 1.000, year: 2003

The fine structure of the mature spermatozoon of the proteocephalidean tapeworm Proteocephalus torulosus was studied by transmission electron microscopy for the first time. The mature spermatozoon of P. torulosus is filiform and tapered at both extremities. It contains two axonemes of the 9+"1" type and of unequal length. The anterior extremity of the spermatozoon bears a helicoidal crested body approximately 100 nm thick. Cortical microtubules of two types lie parallel to the spermatozoon axis. The nucleus is a fine cord of condensed chromatin. The slightly electron-dense cytoplasm contains electron-dense granules in regions II and III of the spermatozoon. The anterior and posterior extremities of the spermatozoon contain a single axoneme. The mature spermatozoon of P. torulosus differs from that of other Proteocephalus species in the presence of a single crested body and in the morphology of its posterior end.
Permanent Link: http://hdl.handle.net/11104/0055052