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The taxonomy of the family Paramphistomidae Fischoeder, 1901 with special reference to the morphology of species occurring in ruminants IV. Revision of the genusGigantocotyle Näsmark, 1937 and elevation of the subgenusExplanatum Fukui, 1929 to full generic status

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Summary

The genusGigantocotyle Näsmark, 1937 is redefined and restricted to contain four valid species, namely,G. gigantocotyle (Brandes in Otto, 1896) Näsmark, 1937 (type species);G. formosanum (Fukui, 1929) Näsmark, 1937;G. symmeri Näsmark, 1937 andG. duplicitestorum Näsmark, 1937.G. lerouxi Yeh, 1957 is regarded as a synonym ofG. symmeri Näsmark, 1937.

The subgenusExplanatum Fukui, 1929 is redefined and raised to full generic rank to contain three valid species, namely,E. explanatum (Creplin, 1847) Fukui, 1929;E. bathycotyle (Fischoeder, 1901) Yamaguti, 1958 andE. anisocotylea (Faust, 1920) Yamaguti, 1958.Paramphistomum siamense Stiles & Goldberger, 1910 andP. fraternum Stiles & Goldberger, 1910 are considered synonyms ofExplanatum explanatum (Creplin, 1847) Fukui, 1929.

The valid species are redescribed and illustrated and scanning electron microphotographs of the tegumental surfaces of some species are provided. A key to the species of each genus is given.

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Author notes

  1. S. L. Eduardo

    Present address: Department of Parasitology & Protozoology, College of Veterinary Medicine, University of the Philippines, Diliman, Quezon City, Philippines

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  1. Commonwealth Institute of Parasitology, 395A Hatfield Road, ALU OXU, St. Albans, Herts, England

    S. L. Eduardo

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Part of a thesis approved by the University of London for the award of the Ph.D. degree.

Part of a thesis approved by the University of London for the award of the Ph.D. degree.

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Eduardo, S.L. The taxonomy of the family Paramphistomidae Fischoeder, 1901 with special reference to the morphology of species occurring in ruminants IV. Revision of the genusGigantocotyle Näsmark, 1937 and elevation of the subgenusExplanatum Fukui, 1929 to full generic status. Syst Parasitol 6, 3–32 (1984). https://doi.org/10.1007/BF00752613

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