Journal of Species Research

The National Institute of Biological Resources (국립생물자원관)
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The first record of Rhabdocoela, Alcha sinensis, Wang & Hu, 2019 (Platyhelminthes: Polycystididae) from Korea

  • Kim, Kimi (Division of EcoScience, Ewha Womans University) ;
  • Van Steenkiste, Niels W.L. (Departments of Botany and Zoology, University of British Columbia) ;
  • Leander, Brian S. (Departments of Botany and Zoology, University of British Columbia) ;
  • Jung, Jongwoo (Division of EcoScience, Ewha Womans University)
  • Received : 2020.04.09
  • Accepted : 2020.05.11
  • Published : 2020.08.31
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Abstract

In this study, a species of Rhabdocoela is reported from Korea for the first time. The kalyptorhynch Alcha sinensis Wang & Hu, 2019, was collected from the intertidal zone of Anmyeon Island. Compared to the original study on A. sinensis and previous studies on A. evelinae, we provide additional detail of these two species through pictures of the stylet and a improved description of the prostate stylet type III, which is composed of a bowtie-shaped base and two pairs of heteromorphic plates with fringed or serrated edges. Two plates are also provided with a rounded "blade". Also, we discuss the importance of the prostate stylet type III as a diagnostic character. After a thorough comparison of the descriptions of A. evelinae Marcus, 1949, and A. sinensis, we conclude that the Korean specimens belong to the latter species. Finally, we discuss the difficulties of interpreting diagnostic characters of the small and complex prostate stylet type III within the genus Alcha.

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References

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