The First Record of Asymphylodora Progenetica (Trematoda, Monorchiidae) in Ukraine
The trematode Asymphylodora progenetica Serkova et Bychovskii, 1940 was found in freshwater mollusks Bithynia tentaculata (Linnaeus, 1758) collected from the Kalmius River (near the city of Donetsk) in Ukraine. This species was recorded for the first time in Ukraine. Previously unknown encysted metacercariae and all detected stages of development are described and figured.
The Discovery of the Intermediate Host for the Trematode Moliniella anceps (Trematoda, Echinostomatidae) in Ukraine
The freshwater molluscs Lymnaea stagnalis (Linnaeus, 1758) are first reported as intermediate hosts of the trematode Moliniella anceps (Molin, 1859) Hübner, 1939, the parasite of meadow birds (Rallidae), in Ukraine (Dneprodzerzhynsk Reservoir, Poltavska oblast). Description and figure of metacercariae are provided.
Rhopalocercous cercariae were found in the gonads of duck mussels, Anodonta anatina (Linnaeus, 1758) collected from the Sluch River (Zhytomyr oblast, Ukraine). The morphological features observed led to conclusion that this species belonged to the genus Phyllodistomum Braun, 1899. Obtained results suggested that the second intermediate hosts in the life cycle of this trematode were absent. Free-swimming cercariae were observed encysting in water. This species is similar to Phyllodistomum pseudofolium Nybelin, 1926 by overall body proportions and ratio of suckers: lengths of oral to ventral sucker 1 : 1.1; widths of the same organs 1 : 1.2. To confirm the taxonomic position of the species found and establish a possible relationship between it and P. pseudofolium an experimental infection of fish Carassius carassius (Linnaeus, 1758) as potential definitive host was performed. The infection was not successful. Descriptions and figures of all detected larval stages of Phyllodistomum sp. are provided.
To increase the currently limited knowledge addressing acanthocephalans parasitizing California sea lions (Zalophus californianus), 33 animals including pups, juvenile and adult males and females from the Marine Mammal Center (TMMC), Sausalito, California, USA were examined. Totally, 2,268 specimens of acanthocephalans representing five species from the genera Andracantha (A. phalacrocoracis and Andracantha sp.), Corynosoma (C. strumosum and C. obtuscens) and Profilicollis (P. altmani) were found. Profilicollis altmani and A. phalacrocoracis, predominantly parasitize fish-eating birds; they were registered in Z. californianus for the first time. Prevalence and intensity of California sea lion infection and transmission of acanthocephalans in these hosts of different age groups were analyzed and discussed. We provide brief morphological descriptions of the five species of acanthocephalan found in California sea lions.
Morphological and molecular data on the type-species of Chaunocephalus Dietz, 1910, Chaunocephalus ferox (Rudolphi, 1795) is provided based on material collected from the type-host, Ciconia nigra (Linnaeus), from Kiev Zoo, Ukraine.