Redescription of myxobolus hungaricus Jaczó, 1940 (myxosporea: myxobolidae), a parasite of bream (Abramis brama L.)

Baska, F. and Molnár, K. (1999) Redescription of myxobolus hungaricus Jaczó, 1940 (myxosporea: myxobolidae), a parasite of bream (Abramis brama L.). Acta Veterinaria Hungarica, 47 (3). pp. 341-349. ISSN 0236-6290

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Abstract

Myxobolus hungaricus Jaczó, 1940 forms relatively large plasmodia on the gills of bream (Abramis brama). The authors give a redescription of this deficiently described parasite on the basis of spores collected from the original habitat, which spores are indicated as a neotype. The plasmodia of the parasite can be found on the gills typically in the spring months, and are located in the central part of the gill filaments. They start to develop in the lumen of capillaries of the secondary lamellae and remain in intralamellar location also after they have reached the mature stage. The spores have a very characteristic shape, as on the surface of the spore valves a distinctly emerging ridge runs parallel to the sutural line. In addition to breams from the typical habitat, Lake Balaton, the plasmodia of M. hungaricus could be detected also on breams originating from the river Danube.

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