The Community of Strongylids (Nematoda, Strongylida) of Working Donkeys (Equus Asinus) in Ukraine
The aim of our work was to study the species composition of the strongylid community of donkeys and to explore the influence of anthelmintic treatments on the community structure. Strongylid nematodes were collected by the diagnostic deworming technique from 33 donkeys from the riding school "Chudo-oslik" (Crimea) (25), from Kharkiv (3) and Kyiv zoos (2) and Kyiv riding schools (3). Seventeen species were found in donkeys studied: 16 species of Cyathostominae and 1 of Strongylinae. Between 2 and 7 species were found per donkey (average of 4.2 ± 2.8). Cyathostomum tetracanthum, C. catinatum, Cylicocyclus nassatus, Cylicostephanus goldi and C. longibursatus) dominated in the community; they were found in 80-100% animals studied and comprised 91.7% of the total number of strongylids collected. Two species C. tetracanthum and Cylicocyclus auriculatus were found to be specific for donkeys. The results obtained showed a reduction of the species richness of the strongylid community in donkeys from riding schools and zoos caused by lack of grazing and by regular anthelmintic treatments.
Rhabdias Pearsoni SP. N. (Nematoda, Rhabdiasidae) From Keelback, Tropidonophis Mairii (Reptilia, Colubridae) In Australia
Rhabdias pearsoni Kuzmin et Tkach, sp. n. is described based on specimens found in the lung of the keelback Tropidonophis mairii (Gray, 1841) from southern Queensland, Australia. The new species is most similar morphologically to Rhabdias horigutii Yamaguti, 1943 and Rhabdias vibakari Kuzmin, 1999 with all three species lacking buccal capsule. The new species differs from R. horigutii by the smaller circumoral lips and papillae, and shorter tail. R. pearsoni sp. n. differs from R. vibakari by position of the nerve ring (in R. vibakari, it is closer to the anterior end than in the new species) and shorter tail. Australian R. pearsoni sp. n. is geographically isolated from R. horigutii and R. vibakari, both occurring in Eastern Asia.
Krefftascaris (Nematoda, Ascaridoidea) from Australian Side-Necked Turtles with Description of Krefftascaris Sharpiloi SP. N. from Chelodina Rugosa
Previously known records of ascaridoid nematodes Krefftascaris Sprent, 1980 are summarized and new records of the genus reported. Krefftascaris sharpiloi Tkach, Kuzmin et Snyder, sp. n. is described from specimens found in the stomach of the northern snake-necked turtle Chelodina rugosa collected from two localities in Northern Territory, Australia. The new species differs from the only previously known Krefftascaris species, K. parmenteri Sprent, 1980, by the presence of thickened and bifurcated anterior edges of the lateral cuticular alae and a difference in the relative distance from the anterior end to the nerve ring which is 1.5 to 2 times greater in K. parmenteri. Comparison of approximately 2.100 bases of ribosomal DNA sequences This study contains first reports of Krefftascaris in Chelodina rugosa, Chelodina burrungandjii, Chelodina canni and Emydura tanybaraga and the first records of this genus in the Northern Territory, Queensland and Western Australia. Molecular phylogenetic analysis based on sequences of nuclear small ribosomal subunit gene has demonstrated close affinities between Krefftascaris and Heterocheilus, the type genus of the Heterocheilidae and Heterocheilinae. Parasitism of several species and genera of Heterocheilidae in crocodiles allows us to hypothesize that Krefftascaris may have been acquired by turtles from crocodilians.
Five specimens of a parasitic nematode Dicheilonema ciconiae (Schrank, 1788) were collected from black stork, Ciconia nigra Linnaeus, in Kyiv Zoological Park. Identification of the nematodes was confirmed by morphological examination of the specimens collected. The ornamentation of the body cuticle in caudal region of males (area rugosa) is first described in D. ciconiae.