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Two new cestode species of Neoskrjabinolepis Spasskii, 1947 (Cyclophyllidea: Hymenolepididae) from the tundra shrew Sorex tundrensis Merriam (Mammalia: Soricidae) in Alaska and Chukotka

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Abstract

Descriptions, illustrations and differential diagnoses for two new species of Neoskrjabinolepis Spassky, 1947, i.e. N. (Neoskrjabinolepis) fertilis n. sp. and N. (Neoskrjabinolepidoides) hobergi n. sp., are given. Neoskrjabinolepis (Neoskrjabinolepis) fertilis was found in the shrew Sorex tundrensis Merriam on the Seward Peninsula (Alaska, USA) and from the mouth of the Anadyr River (Chukotka, Russia), and N. (Neoskrjabinolepidoides) hobergi was found in Sorex tundrensis on the Seward Peninsula (Alaska, USA). Neoskrjabinolepis fertilis n. sp. is characterised by having: rostellar hooks 38–42 μm long and provided with a small epiphyseal thickening of the handle; a long cirrus (85–100 μm), consisting of a basal region with claw-shaped spines and a parabasal region with small, thin needle-shaped spines; a cirrus-sac extending well into the median field; and 55–70 eggs per gravid uterus. Neoskrjabinolepis (Neoskrjabinolepidoides) hobergi n. sp. is characterised by having: rostellar hooks 63–65 μm long and provided with a large epiphyseal thickening of the handle; a short cirrus (45–50 μm), consisting of a basal region with small claw-shaped spines and a parabasal region with thin, needle-shaped spines; cirrus-sac reaching slightly into the median field; and 36–45 eggs per gravid uterus.

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Acknowledgements

This work was funded by the Russian Fund for Fundamental Research (Project Nos. 11-04-49010-a, 11-04-00870-a, 11-04-00342) and by the National Science Foundation “Beringian Coevolution Project” (NSF 0196095 and 0415668).

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Authors and Affiliations

  1. Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, 11 Frunze Street, Novosibirsk, 630091, Russia

    Svetlana A. Kornienko

  2. Institute of Biological Problems of the North, Far-East Branch, Russian Academy of Sciences, 18 Portovaja Street, Magadan, 685000, Russia

    Nikolaj E. Dokuchaev

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  1. Svetlana A. Kornienko
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  2. Nikolaj E. Dokuchaev
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Correspondence to Svetlana A. Kornienko.

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Kornienko, S.A., Dokuchaev, N.E. Two new cestode species of Neoskrjabinolepis Spasskii, 1947 (Cyclophyllidea: Hymenolepididae) from the tundra shrew Sorex tundrensis Merriam (Mammalia: Soricidae) in Alaska and Chukotka. Syst Parasitol 83, 179–188 (2012). https://doi.org/10.1007/s11230-012-9383-6

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