Аннотация:Trypanorhynch cestodes are parasites of rays and sharks. Adult
tapeworms of G. erinaceus were extracted from the spiral valve of rays
Raja clavata Linnaeus, 1758 caught in the coastal waters of the Black
Sea (Russia). New data concerning polymorphism of microtriches,
rhyncheal system and rhynchocoel are presented with illustrations.
Polymorphism of microtriches is revealed in scolex and strobila tegument
specialized to attachment or trophic function. Opposite the early
description (Biserova, 1987; Palm 2004), four types of the
polymicrotriches (palmate spinitriches) are occurred on the bothria distal
surface and margins that are involved in the scolex attachment.
Polymicrotriches diversity includes 9-12 digitate, (5-7)-, (3-4)- and 2-
digitate spinitriches. The ultrastructure and hypothesis of polymeric
nature of palmate spinitriches are demonstrated. Acicular fillitriches,
capilliform fillitriches and microvilli in frontal part of the scolex are
described as trophic microtriches.
The rhyncheal system comprises four armed, invaginable tentacles ,
tentacle sheaths, retractor muscles and hydroprotractor muscular bulbs.
Tentacles, sheaths and muscular bulbs possess a closed cavity – the
rhynchocoe, which is lining by the rhynchothelium cells. Agglomeration
of the rhynchothelium cells is histochemically evidenced in the anterior
portion of the tentacle sheath. The slim neurites penetrate the fibrous
plate of the tentacle sheaths and entering in the rhynchocoel.
The tentacle wall has symplastic structure and consists of anuclear distal
cytoplasm filled secretory granules, extracellular multi-laminar support
plate, and the basal cytoplasm with perikarya, myofibrils and secretory
granules. The tentacular bulbs consist of striated muscles surrounding a
bulb lumen and innervating by the motor nerves.
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