Description of two new species of Myxobolus Bütschli, 1892, M. peleci n. sp. and M. cultrati n. sp., detected during an intensive mortality of the sichel, Pelecus cultratus (L.) (Cyprinidae), in Lake Balaton, Hungary

Réka Borzák, Kálmán Molnár, Gábor Cech, Melitta Papp, Petra Deák-Paulus, Csaba Székely

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Abstract

In the summer of 2014, mass mortality of the sichel, Pelecus cultratus (L.), was observed in Lake Balaton, Hungary. Parasitological examination conducted in the framework of a complete diagnostic survey revealed myxozoan infections. Two species of Myxobolus Bütschli, 1892 were found, one in the gill lamellae and another in the eyes. Following this mass mortality, 113 sichel specimens were examined during a 14-month period. Gill infection with scattered spores in the lamellae was found in 51 fish, while infection in the eyes was recorded in three specimens only. Based upon the morphological and molecular biological data the species from the gills is described here as Myxobolus peleci n. sp. and the species from the eye as M. cultrati n. sp. The 18S rDNA sequences of the two species proved that they differ from all known Myxobolus spp. with sequence data available in the GenBank database. Histological examinations revealed that the spores found in the gill lamellae were derived from plasmodia developing in and around the afferent branchial arteries of the gill arches. No mortality of sichel was recorded in 2015. Infection with these two Myxobolus spp. does not seem to play a role in the mortality of the host fish.

Original languageEnglish
Pages (from-to)667-677
Number of pages11
JournalSystematic Parasitology
Volume93
Issue number7
DOIs
Publication statusPublished - Sep 1 2016

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ASJC Scopus subject areas

  • Parasitology

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