Acta Parasitologica

, Volume 62, Issue 3, pp 617–624 | Cite as

The systematic position and structure of the genus Leyogonimus Ginetsinskaya, 1948 (Platyhelminthes: Digenea) with comments on the taxonomy of the superfamily Microphalloidea Ward, 1901

  • Gerard KanarekEmail author
  • Grzegorz Zaleśny
  • Jiljí Sitko
  • Vasyl V. Tkach


The systematic position, phylogenetic relationships and composition of the genus Leyogonimus Ginetsinskaya, 1948 have always been uncertain. In the present study, we investigate the taxonomic position and phylogenetic relationships between the type-species L. polyoon (Linstow, 1887) and L. postgonoporus (Neiland, 1951) (previously classified as Macyella), based on newly obtained partial sequences of the nuclear large ribosomal subunit DNA. To test some of the previously proposed systematic arrangements, we have also sequenced specimens of Stomylotrema vicarium Braun, 1901 and Phaneropsolus sp. Our results clearly demonstrate that both L. polyoon and L. postgonoporus belong to the family Pleurogenidae Looss, 1899 within the superfamily Microphalloidea. Thus, the Leyogonimidae Dollfus, 1951 should be recognized as a synonym of the Pleurogenidae. Leyogonimus polyoon clearly constitutes a separate, sister branch to the clade consisting of Collyricloides massanae Vaucher, 1969 and L. postgonoporus. Based on these results, we resurrect the genus Macyella Neiland, 1951 with type-species M. postgonoporus. Besides, Collyricloides Vaucher, 1968 is synonymized with Macyella resulting in new combination Macyella massanae (Vaucher, 1968) comb. nov. Molecular phylogenetic analysis has demonstrated the lack of a close phylogenetic relationships between Stomylotema vicarium and Leyogonimus previously placed by several authors into the family Stomylotrematidae Poche, 1925. The status of the Phaneropsolidae Mehra, 1935 as independent family was confirmed with the addition of the newly sequenced Phaneropsolus sp. from China.


Trematoda Microphalloidea Leyogonimus Macyella Stomylotrema molecular phylogeny 28S rRNA 


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2017

Authors and Affiliations

  • Gerard Kanarek
    • 1
    Email author
  • Grzegorz Zaleśny
    • 2
  • Jiljí Sitko
    • 3
  • Vasyl V. Tkach
    • 4
  1. 1.Ornithological Station, Museum and Institute of ZoologyPolish Academy of SciencesGdańskPoland
  2. 2.Department of Invertebrate Systematics and EcologyUniversity of Environmental and Life SciencesWrocławPoland
  3. 3.Comenius MuseumPřerovCzech Republic
  4. 4.Department of BiologyUniversity of North DakotaGrand ForksUSA

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