Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 29-30. (Budapest, 1997)

The total length of rostellar hooks of Taenia sp. approximates that of T. omissa, T. krepkogorski and T rileyi. However, the present species can be distinguished from the latter by hook number, hook shape, and morphology of larvae. The most prominent feature is the length proportion of its blade to the handle. The handle is only 78.6% of the blade. Such hooks were reported only in T. crassiceps and T. rétracta. Morphologically the hooks of the present species closely resemble those of Taenia rétracta Linstow, 1803, a parasite of Vulpes ferrilata found in Tibet (cf. Abuladze 1964). However, T. rétracta has been reported only once, and its larval stages are unknown. Verster (1969) suggested that this species (i. e. T. rétracta) had the same number of rostellar hooks as T. crassiceps, and they were similar in shape to those of the latter species but were larger. However, T crassiceps has not a strobilocercus type larva. Thus, we suggest that, in terms of shape and length of the rostellar hooks, the larvae are those of T. rétracta. This finding of T. rétracta in O. daurica represents a new intermediate host and geographic record. Ganzorig, S., Oku, Y., Gubányi, A., Tenora, F. és Kamiya, ML: Taenia lárvák előfordulása dauriai pocoknyúlban Ochotona daurica (Lagomorpha) Mongóliában A szerzők 1984 és 1992 között Mongóliában 66 dauriai pocoknyúl (Ochotona daurica) helmintológiai vizsgálatát végezték. Hét fonálféreg fajon kívül egy galandféreg lárvaformáját is kimutatták. A hasüregben talált galandférgek lárvái a morfológiai vizsgálat alapján a Taenia retracta Linstow, 1803 Cysticercus alakjának bizonyultak. A pocoknyúl egyben a T. rétracta új köztigazdája is. REFERENCES Abuladze, K. I. (1964): Taeniata of animals and man and diseases caused by them [in Russian]. — Izd. Nauka, Moscow, pp. 530. Babaev, Ya. and Sapargeldyev, M. (1970): Helminth fauna of Ochotona rufescens and some of its characteristics in different areas of Kopetdag (Turkmenian SSR) [in Russian]. —IzvestiyaAN Turk. SSR, Biol. Sei. 1: 58-65. Barrett, R. E. and Worley, D. E. (1970): Parasites of the pika (Ochotona princeps) in two counties in South-Central Montana, with new host records. — Proc. Helminth. Soc. Wash. 37 (2): 179-181. Danzan, G. (1976): New nematoda. Heligmosomum mongolica sp. n. from Daurian pika [in Russian]. — Eronhii ha Sorilyn Biologiin Hureelengiin Buteel 11: 44^48. Danzan, G. (1978a): On nematode fauna in lagomorphs and rodents in Mongolian People Republic [in Russian] — Trudy Gelmintologicheskoi Laboratorii AN SSSR 28: 9-16. Danzan, G. (1978b): On the fauna of Acanthocephala and Cestoda in lagomorphs and rodents in the Mongolian People's Republic [in Russian]. — In: Epidemiologiya i profilaktika osobo opasnyh infektsii v MNR i SSSR, Ulaan Baataar, pp. 169-176. Fedorov, K. P. and Potapkina, A. F. (1975): The helminths of pikas (Ochotonidae) in the south of West Siberia [in Russian]. — Trudy Biolog. Ins. SO AN USSR 23: 203-211. Gvozdev, E. V. (1962): Analysis of the helminth fauna of the pika (Ochotonidae) in relation to the geographic distribution of the host [in Russian]. — In: Parazity dikih Zhivotnykh Kazakhstana. Tr. Inst. Zool. Akad. Nauk Kaz. SSR 16: 63-80.