查看更多>>摘要：A large collection of ascidians was made during the CEAMARC Aurora Australis V3 cruise off Terre Adelie and George V Land a region rarely investigated before at these depths. Sampling was performed by beam trawls and a dredge between 138°-146° latitude East and from 150 to 1700 m depth, on the Antarctic shelf and slope. Three of the 33 ascidian species identified are new and belong to the Stolidobranchia. Half of the species have an exclusive Antarctic distribution, others also occur in Sub-Antarctic areas, but none are common with the southern temperate fauna. The CEAMARC collection does not contain the whole range of already known species from this region. Moreover, brittle and very small specimens were not collected. COI sequences were obtainedfor 37 specimens, including two of the new species.
查看更多>>摘要：The data on taxonomy and distribution of stagnicoline snails of the northern part of Western Siberia (Lower Ob' drainage basin) are relatively scant. The most recent survey of this group in the region was presented by Dolgin (2001) in his unpublishedthesis where three stagnicoline species are recorded: Lymnaea (Stagnicola) palustris (O.F. Miiller, 1774), L. (S.) terebra (Westerlund, 1885), and L. (S.) zebrella (B. Dybowski, 1913). Earlier authors published some data on stagnicolines of the northernwater bodies of Western Siberia (Westerlund 1887; Lindholm 1919; Khokhutkin 1966; Drozdov 1967; Dolgin & Johansen 1980; Dolgin & Novikova 1984), however, all those researchers, as well as Dolgin (2001), did not study the anatomical traits of the snails they had at their disposition and, thus, species identification was carried out solely on the basis of conchological characters. Meanwhile, conchological traits in stagnicoline snails are known to display a large extent of intra- and interspecific variation (Jackiewicz 1993), and therefore are not completely suitable for reliable species determination. In order to discriminate between numerous lymnaeid species, the study of shell characters should be accompanied by the examination of the structure of the reproductive organs. In some cases, it is utterly impossible to distinguish between certain stagnicoline species on the ground of conchological traits (Jackiewicz 1993).
查看更多>>摘要：Recent investigations into the status of Smiley's (1992) subfamily Neobonzinae, as well as the genus Neobonzia Smiley, 1992, has led to a re-evalution of this taxon. Smiley (1992) erected a new subfamily Neobonzinae to include the monotypic genus Neobonzia with the single specimen of Neobonzia moseri Smiley, 1992 (Fig. 1) as its type species. Neobonzia clavata Corpuz-Raros, 2008 is the only other member of the genus.
查看更多>>摘要：In this paper we describe a new quill mite species Stibarokris dastychi sp. nov., parasitizing Great Cormorant Phalacro-corax carbo (Linnaeus) (Pelecaniformes: Phalacrocoracidae) and the male of S. phoeniconaias Skoracki et OConnor, 2010 from AmericanFlamingo Phoenicopterus ruber Linnaeus (new host). Additionally, the improved (including both female and male) diagnosis of the genus Stibarokris Kethley, 1970 and the key to all known species of this genus are given.
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