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A revision of the species of the genus Dicranotaenia (Cestoda: Hymenolepididae). IV. New data on the type-specimens of Dicranotaenia mergi (Yamaguti, 1940)

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Abstract

This fourth paper in a series revising the type-specimens of “older” species of the genus Dicranotaenia Railliet, 1892 sensu Spassky & Spasskaya (1954) presents new data on the type-specimens of the D. mergi (Yamaguti, 1940) from Mergus serrator L. and M. merganser L. The re-examined holotype from Tokyo has shown that the spinous cirrus is 98–135 μm long with a spherical or club-shaped dilatation at its distal end. The shape of this organ differs considerably from the cirrus of D. coronula (Dujardin, 1845), which has a bulbous dilatation in its mid-part. In addition, these species differ in the shape of the aperture of the pars copulatrix vaginae and in other characters. The author therefore includes D. mergi among the valid species of the genus Dicranotaenia.

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  1. Helminthological Institute of the Slovak Academy of Sciences, 040 01, Košice, Czechoslovakia

    J. K. Macko

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  1. J. K. Macko
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Macko, J.K. A revision of the species of the genus Dicranotaenia (Cestoda: Hymenolepididae). IV. New data on the type-specimens of Dicranotaenia mergi (Yamaguti, 1940). Syst Parasitol 22, 199–203 (1992). https://doi.org/10.1007/BF00009666

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  • DOI: https://doi.org/10.1007/BF00009666

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