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A phylogenetic analysis and revised classification of the Monocotylidae Taschenberg, 1879 (Monogenea)

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Abstract

The Monocotylidae Taschenberg, 1879 is revised based on a cladistic analysis of relationships between the constituent species and genera. The monophyly of the family is supported by three apomorphic character states: division of the haptor into one central and eight peripheral loculi; the ovary looping the right intestinal caecum; and tetrahedral eggs. The family is divided into six subfamilies: Calicotylinae Monticelli, 1903 (comprising Calicotyle Diesing, 1850, Dictyocotyle Nybelin, 1941); Dasybatotreminae Bychowsky, 1957 (comprising Anoplocotyloides Young, 1967, Dasybatotrema Price, 1938, Timofeevia n. g., Troglocephalus Young, 1967); Decacotylinae n. subfam. (comprising Decacotyle Young, 1967, Papillicotyle Young, 1967); Heterocotylinae n. subfam. (comprising Heterocotyle Scott, 1904, Neoheterocotyle Hargis, 1955, Nonacotyle Ogawa, 1991, Potamotrygonocotyle Mayes, Brooks & Thorson, 1981, Spinuris Doran, 1953); Merizocotylinae Johnston & Tiegs, 1922 (comprising Cathariotrema Johnston & Tiegs, 1922, Empruthotrema Johnston & Tiegs, 1922, Merizocotyle Cerfontaine, 1894, Squalotrema Kearn & Green, 1983, Triloculotrema Kearn, 1993); and Monocotylinae Taschenberg, 1879 (comprising Clemacotyle Young, 1967, Dendromonocotyle Hargis, 1955, Monocotyle Taschenberg, 1878). The Dendromonocotylinae Hargis, 1955 is removed from subfamilial status and the two genera previously assigned to the subfamily are reassigned to the Monocotylinae. Timofeevia is proposed for Timofeevia rajae (Timofeeva, 1983) n. comb. (formerly Dasybatotrema rajae). Mycteronastes Kearn & Beverley-Burton, 1990 and Thaumatocotyle Scott, 1904 are synonymised with Merizocotyle. Gymnocalicotyle Nybelin, 1941 is not considered a distinct taxon. Revised diagnoses and keys for subfamilies and genera of the Monocotylidae are provided.

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Author notes

  1. Leslie A. Chisholm

    Present address: Department of Parasitology, The University of Queensland, 4072, Brisbane, Queensland, Australia

Authors and Affiliations

  1. Department of Natural Resource Sciences, McGill University, Macdonald Campus, H9X 3V9, Ste-Anne-de-Bellevue, Quebec, Canada

    Terry A. Wheeler

  2. Department of Zoology, College of Biological Science, University of Guelph, N1G 2W1, Guelph, Ontario, Canada

    Leslie A. Chisholm & M. Beverley-Burton

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  1. Leslie A. Chisholm
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  2. Terry A. Wheeler
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  3. M. Beverley-Burton
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Chisholm, L.A., Wheeler, T.A. & Beverley-Burton, M. A phylogenetic analysis and revised classification of the Monocotylidae Taschenberg, 1879 (Monogenea). Syst Parasitol 32, 159–191 (1995). https://doi.org/10.1007/BF00008827

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