Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 28. (Budapest, 1995)
DISCUSSION The genus Apororhynchus Shipley, 1899 includes parasites occurring mainly in the cloaca and rectum of various passeriform birds. They are insufficiently known because of the scarcity of records. Until now, 6 species were included in this genus: A. hemignathi (Shipley 1896) Shipley, 1899 from the cloaca of Hemignathus procerus (Passeriformes), Hawaii (Shipley 1896, cited after Petrochenko 1958; A. aculeatus Meyer, 1931 from the digestive tract of Oriolus cristatus (Passeriformes), Brazil (Meyer 1931); A. amphistomi Byrd and Denton, 1949 from the cloaca of Wilsonia canadensis, Parula americana and Geothlypis trichas (Passeriformes), U. S. A. (Byrd and Denton 1949; Wells and Hunter 1960); A. paulonucleatus Khokhlova and Tsimbalyuk, 1971 from the cloaca and the rectum of Motacilla flava, M. cinerea and Locustella ochotensis (Passeriformes), Russian Far East (Tsimbalyuk 1965, Khokhlova 1966; Khokhlova and Tsimbalyuk 1971) and from the small intestine of Glareola nordmani (Charadriiformes), Siberia (Peresad' ko 1980);/!. chauhani Sen, 1975 from the small intestine of Athene brama (Strigiformes), India (Sen, 1975); and A. silesiacus Okulewicz and Maruszewski, 1980 from the cloaca of Erithacus rubecula, E. luscinia and E. megarhynchos (Passeriformes), Poland (Okulewicz and Maruszewski 1980). A key to the species (without A. chauhani) is presented by Okulewicz and Maruszewski (1980). The present material is very similar to the original description of A. silesiacus (Okulewicz and Maruszewski 1980). There are some differences concerning the dimensions of the proboscides of the males, i.e., 0.90-1.11 long and 1.17 wide in our specimens and 0.44 long and 0.51 in Polish specimens. Compared with the Hungarian material possessing testes with measurements 0.8-1.11x0.6-0.75, the original description reports considerably smaller dimensions of the testes, 0.19-0.21x0.11-0.13. In addition, the giant nuclei in both the tegument and the lemnisci of male specimens from Poland exhibit smaller dimensions. All these differences are probably due to the different degree of maturation of the worms. This is the first record of A. silesiacus for the Hungarian fauna. ACKNOWLEDGEMENTS We are grateful to Mrs E. A. Harris (The Natural History Museum, London) for providing a copy of the paper of Sen (1975). This investigation was supported by the National Scientific Research Foundation of the Republic of Bulgaria, Grant B306/1993. Dimitrova, Z. M., Murai, É. and Georgiev, B. B.: Az Apororhynchus silesiacus Okulewicz and Maruszewski, 1980 (Acanthocephala) előfordulása Magyarországon és újabb adatok a faj morfológiájához A szerzők a Magyar Természettudományi Múzeum Parazitológiai Gyűjteményét képező, az Erythacus rubecola-ban élősködő Apororhynchus silesiacus buzogányfejű féreg nyolc példányának meghatározása és morfológiai vizsgálata alapján annak új leírását adják. A magyar faunára új parazita az eredeti leírástól a proboscis, a herék és a "nagy magvak" méretében különbözik.
