Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 28. (Budapest, 1995)

© Hungarian Natural History Museum Hungarian Society of Parasitologists Parasit. hung., 28: 83-88, 1995 The first record in Hungary of Apororhynchus silesiacus Okulewicz and Maruszewski, 1980 (Acanthocephala), with new data on its morphology Zlatka M. DIMITROVA

1

, Éva MURAI

2 and Boyko B. GEORGIEV

3 1 Department ofBiology, Faculty of Agriculture, Thracian University, Student Campus, 6000 Stara Zagora, Bulgaria Department of Zoology, Hungarian Natural History Museum, Baross u. 13, H1'088 Budapest, Hungary ^Institute of Ecology, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113 Sofia, Bulgaria (Received 28 November, 1995) Abstract: Eight mature specimens (three males and five females) of Apororhynchus silesiacus Okulewicz and Maruszewski, 1980 (Acanthocephala, Apororhynchida, Apororhynchidae) have been found in the small intestine of Erithacus rubecula at Alsóperepuszta, Hungary (new geographical record). The species is redescribed and figured on the basis of the Hungarian material. The main differences from the original description concern the dimensions of the proboscis, the testes and the giant nuclei in males. Keywords: Acanthocephala, Apororhynchus silesiacus, morphology, Erithacus rubecula, Hungary. INTRODUCTION In the course of an investigation on the acanthocephalans from non-aquatic birds from the Collection of the Hungarian Natural History Museum, Budapest, 8 mature specimens of the genus Apororhynchus Shipley, 1899 were found. Although some of the specimens were in bad condition, the examination of these parasites revealed that they belong to A. silesiacus Okulewicz and Maruszewski, 1980 (until now known only from its original description) and provided new data about the morphometry of the species. MATERIALS AND METHODS The present study was based on 3 male and 5 female specimens collected from the small intestine (?) of Erithacus rubecula (coll. no. 830) captured in the Bakony (Alsóperepuszta) in July 1966. The specimens were fixed and preserved in a mixture of ethanol and formalin. They were studied in temporary 25-100 % glycerine mounts (for the elucidation of the morphology of proboscis), and dimethylphthalate mounts and lactic acid