Morphological and histological observations on male of genus Paragorgorhynchus (Acanthocephala) with special reference to reproductive system.

The general morphology of Paragorgorhynchus aswanensis was studied by the scanning electron microscope and by histological examination. The major areas studied were proboscis and the receptacle with the associated muscles, the nerve ganglion with the retinacular nerve cells and the lemnisci. The details of genital system in whole mount preparation and photomicrographs of cross-section from wax preparation are depict, with morphological changes along the length of the mature male worm.