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 µm) 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 µm, mean 48 µm) 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.
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