L. Forró szerk.: Miscellanea Zoologica Hungarica 7. 1992 (Budapest, 1992)

Sey, O.; Eöry, K.: Helminth parasites of amphibians of the Lake Balaton area

Halipegus kessleri (Grebnitzky, 1872) (Fig3) Diagnosis: Body length 1.52-1.83 mm, body width 0.46-0.49 mm. Tegument without spines. Oral sucker 0.12-0.15 mm in diameter. Ventral sucker 0.320.37 mm in diameter. Testes oval, slightly diagonal, measure 0.14-0.16 x 0.06-0.09 mm. Ovary 0.09-0.12 mm in diameter. Egg measures: 0.043-0.049 x 0.011-0.018 mm with filaments. Habitat: mouth cavity. Brandesia turgida (Brandes, 1888) This species is one of the earnestly described trematodes from frogs in Hungary (Rátz 1913). At the same time it seems to be one of the rarer flukes because it was not discovered during the subsequent examinations (Edelényi 1942, 1960, Sey 1964). These flukes are intestinal parasites located in cysts at the junctions of the stomach and the intestine, forming clearly cut histological changes. Cysts are highly elevated from the surface of the gut. They are spherical measuring 1.15 mm in diameter (Fig. 4). Flukes are usually attached to the inner surface of the cyst by oral sucker while the posterior body end stretches the lumen of the intestine (Fig. 5). Eggs are discharded through the genital pore into the lumen of the host and they empty with the content of the intestinal tract to the host's environment (Fig6). Oshmarin & Oshmarin (1989) have reported the absence of the opening at the oral sucker and as a consequence of this, they supported that the nutriments are taken up by these flukes through the tegument. Our observations, however, showed that B. turgida has mouth opening (Fig. 6) and they probably take nourishment as other flukes do. References Edelényi, B. (1942): A Szeged környéki békák belső élősködő férgei (Die endoparasitischen Würmer der Frösche von der Umgebung der Stadt Szeged). -Állatt. Közlem. 39: 1-21. Edelényi, B. (1960): Adatok Egeres Hajdúszoboszló környékén élő békák belső élősködő férgeinek ismeretéhez (Zur Kenntnis der internen Parasiten von Fröschen aus der Umgebung von Eger und Hajdúszoboszló).-Egri Ped. Fôisk. Füzetei No. 182, 6: 343-358. Margó, T.(1879): Budapest és környéke állattani tekintetben [Budapest and its surroundings from zoological point of view]. - Egyetemi Nyomda, Budapest, 140 pp. Oshmarin, P. G. & Oshmarin, A. P. (1989): Characteristics of the structure and localization of Brandesia turgida (Brandes, 1888) (Trematoda: Pleurogenetidae) (in Russian). - Parazit. Issledovaniya, Vladivostok, Yaroslav State Univ., Yaroslav, pp. 108-112. Pachinger, A. (1888): Negyedik közlemény békáink parazitáiról s újabb adatok a trematodák bonc- és élettanához [Fourth report on the parasites of frogs and new data to the anatomy and physiology of trematods]. - On'os-Tenntud. Értesítő 13: 1-2. Rátz, 1.(1913): Classis Trematoda. - Fauna Regni Hungáriáé, Budapest pp. 30-33. Sey, O. (1964): Tanulmányoka magyarországi parazita féregfaunáról I. (Studies on the parasitic worms of Hungary. I.). -Pécsi Tanárképző FőisL Tud. Közi. 1: 413-437. Authors' address: Dr. Ottó Sey Krisztina Eöry Department of Zoology Pannon University of Agricultural Sciences H- 8361 Keszthely Hungary