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Cercaria of the Trematode Plagiorchis Mutationis (Trematoda, Plagiorchiidae) from the Pond Snails, Lymnaea Stagnalis, in Ukraine

Morphological characteristics and measurements of Plagiorchis mutationis Panova, 1927 cercaria found for the first time in the intermediate host, pond snail Lymnaea stagnalis in Ukraine are given.

The Morphology and Biology of the Trematode Gigantobilharzia Acotylea (Digenea, Schistosomatidae)

Morpho-biological traits of the trematode Gigantobilharzia acotylea Odhner, 1910 at all stages of ontogeny are studied. Mollusks Physa fontinalis and Anisus spirorbis widespread in the waterbodies of the Syrdarya River valley were found to be intermediate hosts of this trematode under natural and experimental conditions in Uzbekistan. Prevalence of infection of P. fontinalis and A. spirorbis by Gigantobilharzia spp. parthenitae and cercariae reached 0.4 and 0.3%, respectively. Experimentally, 100% of these mollusks were infected. The maturation of cercariae in intermediate hosts ranged from 23 to 44 days depending on temperature. The cercariae actively penetrated the skin of birds and reached maturity in 30-35 days. A complex of traits of various developmental stages, particularly cercariae necessary for the differentiation of the Gigantobilharzia spp. is suggested based on of the analysis of morpho-biological peculiarities of these trematodes.

., Olenev A. V., Dobrovolsky A. A. Two species of cyatocotylid cercariae from freshwater mollusk Melanopsis praemorsa // Parasitology. — 1980. — 14 , N 4. — P. 299-307. — Russian: Галактионов К. В., Оленев А. В., Добровольский А. А. Два вида циатокотилидных церкарий из пресноводного моллюска Melanopsis praemorsa. Ginetsinskaya T. A., Dobrovolsky A. A. A new method for detecting sensillae of trematode larvae and significance of these structures for systematics // Dokl. AS USSR. — 151 , N 2. — P. 460-463. — Russian: Гинецинская Т. А., Добровольский А. А. Новый метод

образований для систематики. Manafov A. A. Fauna of parthenitae and cercariae of the mollusk Melanopsis praemorza (L.) from northern Azerbaijan. - Moscow, 1990. - Dep. VINITI, N 4360. - Vol. 90 . - 168 p. - Russian: Мана-фов А. А. Фауна партенит и церкарий моллюсков Melanopsis praemorza (L.) из Северного Азербайджана. Manafov A. A. Morphology of new virgulid cercaria from freshwater mollusk Melanopsis praemorsa (L.) from Azerbaijan water bodies // Ш Int. sci. conf. Mountain ecosystems and their conponents. - Nalchik, 2009. Fauna of mountains. - Moscow: KMK, 2009. - P

образований для систематики. Manafov A. A. Fauna of parthenitae and cercariae of mollusk Melanopsis praemorza (L.) from northern Azerbaijan. - Moscow, 1990. - Dep. VINITI, N 4360 - Vol. 90 . - 168 p. - Russian : Манафов А. А. Фауна партенит и церкарий моллюсков Melanopsis praemorza (L.) из Северного Азербайджана. Manafov A. New virgulid cercaria (Trematoda, Lecithodendroidea) from mollusc Melanopsis praemorsa (Melanopsidae) from Azerbaijan water bodies. Morphology and chaetotaxy of Cercaria agstaphensis 11 // Vestnik zoologii. - 2011. - 45 , N 2. - P. 105-111. Manafov

Cathaemasia Hians (Digenea, Cathaemasiidae) from Planorbis Planorbis (Mollusca, Gastropoda) in Reservoirs of Central Polissya

The paper presents the description of Cathaemasia hians Rudolphi, 1809 trematode found on the territory of Ukraine in an intermediate host, fresh-water molluscs Planorbis planorbis. We present also a comparison of metrical characters of the studied C. hians cercariae and those described by other researchers.

Life Cycle of the Trematode Notocotylus intestinalis (Digenea, Notocotylidae) under Natural Conditions in Primorye Region (Russia)

The redia, cercaria, adolescaria and adult trematodes Notocotylus intestinalis Tubangui, 1932 are described. It was established that under natural conditions of Primorye Region, the first intermediate hosts of this trematode are snails Parafossarulus manchouricus and P. spiridonovi. Adult worms were grown in the chicken.

Abstract

The paper presents results of the studies on alterations in the structure and functions of mollusc organs under the effect of the trematode Orientobilharzia turkestanica (Skrjabin, 1913) larvae. Destructive changes were observed along with a vast necrosis of the hepatopancreatic gland. Parasitism of O. turkestanica parthenitae and cercariae in L. auricularia causes deep histopathological changes in the tissues. Protein, carbohydrate and fat metabolism disorders result in the weakening of molluscs and loss of their lability, which is essential for adaptation to environmental changes. The latter is confirmed by a high mortality of infected individuals.

References Beljakova Yu. V. Cercariae of Kurgaldzhinsk lakes. — Parasites as components of water and ground biocenoses of Kazakhstan. — Alma-Ata: Nauka KazSSR, 1981. — P. 28-58. — Russian: Белякова Ю. В. Церкарии Кургальджинских озер. - Паразиты - компоненты водных и наземных биоценозов Казахстана. Bray R. A. Family Lissorchiidae Magath, 1917 // Key to the Trematoda Vol. 3 / D. I. Gibson, A. Jones, R. A. Bray. — London: International and The Natural History Museum, 2008. — 848 p. Chernogorenko M. I. Larvae of trematodes in mollusks of the Dnieper River and