Dr. Murai Éva szerk.: Parasitologia Hungarica 20. (Budapest, 1987)
from the gills under a stereo-micros cope. After examining the parasites alive, they were placed in glycerinated gelatin or ammonium picrate solution and fixed as a slide preparation under a cover slip. RESULTS The gills of all fish studied were parasitized by Dactylogyrus spp. D. extensus occurred most frequently (in all the 20 fish). D. achmerowi, D. anchoratus and D. vastator were found in 17, 4 and 2 fish, respectively. In addition to these already known species, in 16 out of 20 fish a parasite up to then unknown in Hungary was found. On the basis of its morphological characteristics (Figs 1 and 4/a) the parasite was identified as D. molnári, a species described by ERGENS and DULMA (1969). As regards the intensity of infection, D. molnári , similarly to D. achmerowi (Figs 2 and 4/b) occurring together with the former as mixed infection, exceeded D. extensus in the number of parasite specimens present. D. sahuensis (Figs 5 and 4/c) and D. minutus, species of differential diagnostic importance, were not found in the fish examined. DISCUSSION The appearance of D. molnári in Hungary means that another parasite has been added to the parasite fauna of the European common carp. Whereas the earlier described D. sahuensis , similarly to D. minutus , seems to be a rare parasite, it is expected that D. molnári will become widespread in a short time, as was the case with D. achmerowi. No data are available on the pathological significance of D. molnári. These worms, which have a body mass 1/1000 that of D. vastator and D. extensus , can probably be regarded as less pathogenic Dactylogyrus species, similarly to D. minutus and D. achmerowi. MOLNÁR, K.: Egy új pontyélősködő, Dactylogyrus molnári Ergens et Dulma, 1969 (Monogenea) megjelenése Magyarországon A Távol-Keleten honos amuri tőponty (Çyj^inus_carp_io haejn_aJoj^e_rus) gazdag Dactylogyrusfaunájából feltehetően halimport útján újabb faj, a Dactylogyurs molnári Ergens et Dulma, 1969 került át Európába. Magyarországon jelenleg a korábban kimutatott Dactylogyrus anchoratus, D. extensus, D. minutus és D. vastator fajok mellett Cypj2nuj_carpio-n a D. ach merowi, D. molnári és D. sahuensis is előfordul. Captions to figures: Fig. 1: Anchors and hooks of Dactylogyrus molnári Fig. 2: Anchors and hooks of Dactylogyrus achmerowi Fig. 3: Anchors and hooks of Dactylogyrus sahuensis Fig. 4; (a) Copulatory organ of Dactylogyrus molnári;-(b) Copulatory organ of Dactylogyrus achmerowi; -(c) Copulatory organ of Dactylogyrus sahuensis. Magnification: 1200 x (all figures)
