N. A. Pospekhova

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The scoleces of Wardium chaunense penetrated into the intestinal wall of a snipe (Gallinago gallinago) were examined by light and transmission electron microscopy for the first time. Naturally, the scolex is characterised by a shorter length in comparison with when it is removed from the host. Ultrastructural characteristics of the main parts of the scolex,(More)
This study was designed to provide information on the ultrastructural traits of the cirrus sac of the male strobila of the dioecious cyclophyllidean tapeworm, Shipleya inermis Fuhrmann, 1908 from the small intestine of long-billed dowitchers, Limnodromus scolopaceus, in Chukotka, Russia. The cirrus sac is characterised by a thick muscular wall (comprising(More)
Metacestodes Dioecocestus asper (Cyclophyllidea) habe been found in larvae of dragonflies Aeshna spp. (Odonata, Anisoptera) from the lakes of the Upper Kolyma and northern Okhotsk seaboard basins (3.8 +/- 0.46 % of n = 1730 and 0.09 +/- 0.09 % of n = 1065, respectively) for the first time. Thus, participation of dragonflies in lifecycle of Dioecocestidae(More)
Investigations were undertaken using light and transmission electron microscopy to clearly delineate the morphology of the cercomer, i.e. the protective envelopes and tail appendage, in cysticercoids of Microsomacanthus paraparvula, which develop in the haemocoel of the caddisworm Grensia praeterita (Insecta: Trichoptera). Two protective envelopes, the(More)
Two cysticercoids, belonging to ascocercus type, namely euascocercus and multicercus, were found in haemocoele of dragonfly larvae of the genus Aeshna from the lakes of the Magadan Province. The cysticercoid of Schistotaenia srivastavai Raush, 1970 (euascocercus) is formed of the outer (exocyst) and inner (endocyst) envelopes, containing the scolex and(More)
The megalocercus of Dioecocestus asper (Mehlis 1831) from the haemocoele of dragonfly larvae possesses two envelopes: outer (exocyst) and inner (endocyst) ones. The exocyst contains the large endocyst and larval strobila with scolex attached to the latter. Outer and inner surfaces of these envelopes are organized as the tegument and have some structural(More)
Morphogenesis of the true ascocercus (euascocercus or euascocysticercoid) was studied in Schistotaenia srivastavai, a relatively rare parasite of the Red-necked Grebe Podiceps griseigena, and of intermediate hosts, damselfy and dragonfly larvae, in the Okhotsk-Kolyma region. Stages of postembryonic development were reconstructed by the material from(More)
Histochemical reaction with glyoxylic acid has revealed a specific fluorescence caused by the presence of indolamine (apparently serotonin) in the nervous system of larva and mature cestode. Fluorescence manifests itself in neurons and nerve fibres of the central ganglion and its commissure, in nerve cells of the proboscis, in longitudinal trunks and(More)
  • N. A. Pospekhova, обзор литературы, Н.А. Поспехова
  • 2017
The postembryonic development of most cyclophyllids within the intermediate host includes one invagination. This positions the remnants of the primary lacuna between the walls of the dense cyst. Some diplocysts, floricerci and ascocerci undergo two invaginations. In fully formed larvocysts belonging to these types, the remnants of the primary cavity are(More)
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