The diversity of Khawia tapeworms (Cestoda: Caryophyllidea) of barbels (Cyprinidae: Barbinae) in the western Palearctic: the existence of vicariant lineages and the description of a new species from the Iberian Peninsula
Language English Country Great Britain, England Media print
Document type Journal Article
PubMed
40521717
DOI
10.1017/s0031182025100206
PII: S0031182025100206
Knihovny.cz E-resources
- Keywords
- 18S rDNA, 28S rDNA, Cypriniformes, Europe, ITS2, Middle East, morphology, taxonomy, vicariance,
- MeSH
- Cestoda * classification genetics anatomy & histology isolation & purification MeSH
- Cestode Infections * veterinary parasitology epidemiology MeSH
- Cyprinidae * parasitology MeSH
- DNA, Helminth genetics chemistry MeSH
- Phylogeny MeSH
- Genetic Variation MeSH
- Fish Diseases * parasitology epidemiology MeSH
- RNA, Ribosomal, 18S genetics MeSH
- RNA, Ribosomal, 28S genetics MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Portugal epidemiology MeSH
- Spain epidemiology MeSH
- Names of Substances
- DNA, Helminth MeSH
- RNA, Ribosomal, 18S MeSH
- RNA, Ribosomal, 28S MeSH
The caryophyllidean tapeworm Khawia armeniaca has long been regarded as an exceptionally widespread species within its genus, notable for its significant morphological variability. However, with the accumulation of molecular data from different fish hosts, K. armeniaca was suspected to represent a species complex. To clarify the true identity of these parasites, a comprehensive morphological and molecular study (using 18S, 28S and ITS2 ribosomal regions) of K. armeniaca tapeworms from barbels (Barbinae) across the Iberian Peninsula and the Middle East has been conducted. The results revealed two genetically distinct lineages within the K. armeniaca complex. The first lineage, found in Arabibarbus grypus, Barbus lacerta, Capoeta birunii, Carassobarbus luteus, Luciobarbus barbulus, L. esocinus and L. kersin in Iraq and Iran, is genetically congruent with K. armeniaca (Cholodkovsky, 1915), originally described from the Sevan khramulya (Capoeta sevangi) in Armenia. The second lineage, identified in Luciobarbus bocagei (type host), L. comizo and L. guiraonis from Portugal and Spain, is described as Khawia iberica n. sp. In addition to clear molecular divergence, K. iberica can be distinguished from K. armeniaca by notable morphological differences, including variations in the shape, structure and size of the ovary, the anterior extension of the vitelline follicles, the testes and several morphometric parameters.
Department of Botany and Zoology Faculty of Science Masaryk University Brno Czech Republic
Institute of Parasitology Biology Centre Czech Academy of Sciences České Budějovice Czech Republic
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