English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  Host-specificity patterns are not well-defined for trematodes of the genus  Phyllodistomum  Braun, 1899. The Eurasian ruffe,  Gymnocephalus cernuus  L., has been recorded as a definitive host for  Phyllodistomum folium  (Olfers, 1816),  P. angulatum  Linstow, 1907 and  P. megalorchis  Nybelin, 1926 and as the type-host for  P. pseudofolium  Nybelin (1926). A wide range of other host fishes have been recorded for these species as well. All present host records have been based on light microscopy and the life-cycles of  P. pseudofolium ,  P. angulatum  and  P. megalorchis  are unknown. The validity of  P. pseudofolium  and  P. megalorchis  require verification. In this study, rDNA sequences generated from adult  Phyllodistomum  spp., as well as from larval stages developing in  Pisidium amnicum  Müller, were analysed to establish the real number of  Phyllodistomum  species utilizing  G. cernuus , and to associate larvae with the corresponding adult forms.    Results  Phylogenetic analyses of adult and larval stages of  Phyllodistomum  spp. based on ITS2 and partial 28S rDNA data allowed the confirmation of the validity of  P. pseudofolium . A macrocercous cercaria, known as  Phyllodistomum  sp. from  P. amnicum  is genetically identical to adult  P. pseudofolium. Phyllodistomum megalorchis  obtained from its type-host,  Lota lota  L., showed no genetic differences from  P. angulatum  parasitizing  Sander lucioperca  L .  In our analysis,  P. pseudofolium ,  P. angulatum  and  P. macrocotyle  formed a highly supported clade despite the fact that these species appear to be associated with distinct patterns of first intermediate host identity and cercarial morphology. Some morphological differences between gravid specimens of  P. pseudofolium  and  P. angulatum  were observed and their SEM tegumental surface topography is described.    Conclusions  The results lead us to the perception that macroevolutionary host switching in the genus  Phyllodistomum  is independent of host phylogeny .  This study suggests strict host-specificity (oioxeny) for  P. pseudofolium  using one first intermediate host species ( P. amnicum ) and one definitive host species ( G. cernuus ) . Phyllodistomum megalorchis  is to be regarded as a synonym of  P. angulatum . The close phylogenetic relatives,  P. pseudofolium  and  P. angulatum , can be differentiated by morphological traits, the micromorphology and tegumental surface topography of these two species is intended to provide useful data for their identification and support the use of such features as a valuable taxonomic criterion. Molecular data showed that  G. cernuus  is a definitive host for two species: the oioxenous  P. pseudofolium  and the euryxenous  P. folium.

parasites and vectors

Host specificity, molecular phylogeny and morphological differences of Phyllodistomum pseudofolium Nybelin, 1926 and Phyllodistomum angulatum Linstow, 1907 (Trematoda: Gorgoderidae) with notes on Eurasian ruffe as final host for Phyllodistomum spp.