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  • Title: Ultrastructure of sperm and spermatogenesis of Cichlidogyrus thurstonae (Platyhelminthes, Monogenea, Monopisthocotylea).
    Author: Ashour AA, Soliman MI, el Arousi N, Stietieh FM.
    Journal: J Egypt Soc Parasitol; 2000 Apr; 30(1):211-9. PubMed ID: 10786032.
    Abstract:
    The present work is the first ultrastructural description of mature spermatozoon of the monogenetic trematode Cichlidogyrus thurstonae recovered from the gills of the Nile fish Oreochromis niloticus. The mature spermatozoon of C. thurstonae is long and filiform with a nucleus, mitochondrion and a single axoneme, pressed tightly together for most of their length. As most other platyhelminthes, a solid central unit in the complex central element of the sperm axoneme is present. There are no peripheral microtubules in the sperm and the arrangement conforms to the sperm pattern 4 in the scheme of Justine et al. (1985).
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