Volume 50/Number 1/Abstract 6

Acta Parasitologica, Vol.50, No. 1, 2005, 56-64
Gergana P. Vasileva(1)*, Vasyl V. Tkach(2,3) and Todor Genov(1) - Two new hymenolepidid species (Cestoda, Hymenolepididae) from water shrews Neomys fodiens Pennant (Insectivora, Soricidae) in Bulgaria

(1)Central Laboratory of General Ecology, 2 Gagarin Street, 1113 Sofia, Bulgaria; (2)Department of Biology, University of North Dakota, Grand Forks, P.O. Box 9019, Grand Forks, 58202-9019 North Dakota, U.S.A.; (3)W. Stefanski Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Street, 00-818, Warsaw, Poland

*Corresponding author: gpv@ecolab.bas.bg

ABSTRACT

Two new hymenolepidid species, Coronacanthus magnihamatus sp. nov. and Triodontolepis boyanensis sp. nov. are described from the European water shrew, Neomys fodiens, in Bulgaria. The most important differentiating features of C. magnihamatus are the length of the rostellar hooks (26-28 um, mean 27 um) and the thick-walled uterus, which does not form capsules in gravid proglottids. T. boyanensis is distinguished from other members in the genus by the number (16) and size (47-48 um, mean 48 um) of the rostellar hooks, the non-capsulate gravid uterus, containing relatively large number of eggs (35-70, mean 49) and the embryophore, possessing polar filaments. The types of uterine development in hymenolepidids of Neomys spp. are discussed.

KEY WORDS: Coronacanthus magnihamatus sp. nov., Triodontolepis boyanensis sp. nov., Cestoda, Neomys fodiens, Insectivora, Bulgaria

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