Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 31. (Budapest, 1998)

as Paranoplocephala ondatrae (Rausch, 1948) n. comb. After the re-examination of the above-mentioned species and materials the description of a new species is presented. MATERIALS AND METHODS The abbreviations for the collections are as follows: HNHM, Parasitological Collection of Hungarian Natural History Museum; USNPC, U.S. National Parasite Collection, Beltsville, Maryland. The following cestodes were studied: A. macrocephala (Douthitt, 1915) = Paranoplocephala macrocephala (Douthitt, 1915) Rausch, 1976, holotype USNPC No. 5681-1, 5681-2; Paranoplocephala genovi sp. n. HNHM 67380-67384 from Ondatra zibethicus, Ceské Budéjovice, Czech Republic, 10. 1955; muskrats were collected by F. Tenora, helminths were stained in borax carmine; Paranoplocephala aquatica paratypes HNHM-67368-1/2 fxomArvicola terrestris , Srebarna, Bulgaria, 27.04.1989. Most of the distance measurements were calculated by a special image acquisition system developed in our laboratory. An Olympus BH-2 microscope was connected with an IBM-compatible PC. A grey scale Panasonic video camera (420 lines) and a high-resolution video digitising card (760 lines) were used. All distance measurements in the paper are given in micrometre unless stated otherwise. RESULTS Paranaplocephala genovi sp. n.* Synonyms: Paranaplocephala ondatrae (Rausch, 1948) sensu Tenora et Murai, 1980 nee Rausch, 1948; Paranaplocephala aquatica Genov, Vasileva et Georgiev, 1996 pro parte. Holotype: HNHM 67381/a-d [personal slide numbers of F. Tenora: 478,479,480, 481 ; HNHM 67381/b was incorrectly published as HNHM-479 by Genov et al. (1996)], host: Ondatra zibethica, localisation: small intestine, locality: Ceské Budéjovice, Czech Republic, October 1955, one whole specimen on four slides Paratypes: HNHM 67382/a-b, HNHM 67383, HNHM 67384 [personal slide numbers of F. Tenora: 482,483,484,487; HNHM 67382/b, HNHM 67383 and HNHM 67384 were incorrectly published as HNHM-483,

484 and 487 by Genov et al. (1996)], host: Ondatra zibethicus, localisation: small intestine, locality: Ceské Budéjovice, Czech Republic, October 1955; 3 spécimens on four slides, with the same data as the holotype, except for strobila length. Description: Strobila band-like, 118 mm long, maximum width attained in gravid or pregravid segments. All segments wider than long, with relative length increasing posteriorly, width of mature segments 5.7 times than length, 2284 to 2434 (mean 2348) by 332 to 459 (mean 408), width of gravid segments 13.3 times than length, 4464 to * This cestode is named in honour of Prof. Dr. Todor Genov, D.Sc, Central Laboratory of General Ecology, Bulgarian Academy of Sciences, Sofia, Bulgaria, who has made a great contribution to research on cestodes parasitizing Rodentia and Insectivora.