SCANNING ELECTRON-MICROSCOPIC INVESTIGATION OF THE TREMATODE HASSTILESIA-OCHOTONAE GVOSDEV, 1962

A total of 32 specimens of Hasstilesia ochotonae Gvosdev, 1962 from Ochotona rutila were studied by scanning electron microscopy. The whole body surface, except suckers and area around the genital pore, is covered with multipointed spines. Smooth sensory papillae are concentrated on the oral and ventral suckers and in the vicinity of the genital pore. The evaginated cirrus is covered by transversely folded tegument on its base and by microvilli on its apical part. The Laurer's canal is surrounded by spines. It is typical of this species that one papilla is immediately behind the opening of this canal, on the axis between it and the excretory pore.