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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Background  Within the genus  Crepidostomum  Braun, 1900, identification of species and taxonomic decisions made only on the basis of adult morphology have resulted in great problems associated with evaluating actual diversity and validity of species. Life-cycle data, while equal in importance to adult characters, are scarce, controversial or incomplete for most  Crepidostomum  spp. In this study, rDNA sequences generated from adult and larval  Crepidostomum  spp. and some other allocreadiid species were analysed to reveal the diversity and phylogenetic relationships of the species and their host range. Detailed morphological description based on light microscopy, SEM tegumental surface topography and genetic data are provided for the poorly known trematode  C. oschmarini  Zhokhov & Pugacheva, 1998 found in the intestine of two teleost fish species,  Barbatula barbatula  (L.) and  Cottus gobio  L.    Results  We characterized 27 isolates of adult and larval parasites. Based on newly obtained  28S  and ITS1- 5.8S -ITS2 rDNA sequences, new intermediate and final hosts were ascertained, and life-cycles clarified for some allocreadiids. New knowledge on the diversity and phylogenetic relationships of European  Crepidostomum  spp. was gained. The validity of  C. oschmarini  was verified based on comparative sequence analysis. Ophthalmoxiphidiocercariae of  C. oschmarini  were recorded in sphaeriid bivalves  Pisidium  ( Euglesa )  casertanum  (Poli) .  Additionally, morphological differences between gravid specimens of  C. oschmarini  and other related species were observed.    Conclusions  Species of the Allocreadiidae parasitizing fishes in Europe are distributed among two monophyletic genera,  Allocreadium  and  Bunodera , and two paraphyletic  Crepidostomum  clades. A complex of  Crepidostomum metoecus  (syn.  C. nemachilus) ,  C. oschmarini  and  Crepidostomum  sp. 2 clustered in one clade, and a complex of  C. farionis ,  Crepidostomum  sp. 1 and, probably,  C. wikgreni  in the other. Molecular data indicated that  C. oschmarini  and  Crepidostomum  sp. 2 presumably have a wide geographical distribution in Europe. The new data provided evidence that  Crepidostomum  is a more diverse genus than can be judged from morphological data and host switching in this genus may occur independently of fish-host phylogeny.

parasites and vectors

Diversity and phylogenetic relationships of European species of Crepidostomum Braun, 1900 (Trematoda: Allocreadiidae) based on rDNA, with special reference to Crepidostomum oschmarini Zhokhov &amp; Pugacheva, 1998