Abstract
The morphology of the two little-known fish cestodes of the genus Khawia Hsü, 1935, K. rossittensis (Szidat, 1937) and K. parva (Zmeev, 1936) from cyprinid fishes, were studied on the basis of newly collected specimens from goldfish Carassius auratus auratus (L.) and museum specimens, respectively. This paper provides the first detailed species diagnosis for K. rossittensis from Slovakia, which is compared with specimens from different geographical regions and K. parva, a somewhat similar Far Eastern species from the same host. The two species differ in scolex morphology, anterior extent of the vitelline follicles, shape of the ovary and size of the eggs. Based on these differences, K. rossittensis and K. parva are considered to be separate taxa. K. parva, listed among the “species incertae sedis” by Mackiewicz (1972) and even within Caryophyllaeus Gmelin, 1790 by Schmidt (1986), should be considered a valid species of Khawia. The results support the previous conclusions of Kulakovskaya (1961), Dubinina (1971) and Protasova et al. (1990).
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Acknowledgements
The authors are grateful to: Dr F. Moravec, Institute of Parasitology AS CR, České Budějovice, Czech Republic and Dr A.K. Galkin, Institute of Zoology, St. Petersburg, Russia for providing museum material of Khawia spp. from the Ukraine, Belorussia and Russia; Dr G. Hrčková for help with preparation of histological sections; and Bc. L’. Burik for technical assistance in the field and the laboratory. The study was supported by the Grant Agency VEGA, project no. 2/7192/27 and partly by European Commission’s Research Infrastructure Action via the SYNTHESYS Project no. DE-TAF-127.
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Oros, M., Hanzelová, V. The morphology and systematic status of Khawia rossittensis (Szidat, 1937) and K. parva (Zmeev, 1936) (Cestoda: Caryophyllidea), parasites of cyprinid fishes. Syst Parasitol 68, 129–136 (2007). https://doi.org/10.1007/s11230-007-9099-1
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DOI: https://doi.org/10.1007/s11230-007-9099-1