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Taxonomic review of Korean Ephemera Linnaeus with lectotype designation of E. sachalinensis Matsumura (Insecta: Ephemeroptera: Ephemeridae)

  • Alfredo Mayorga (Department of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University) ;
  • Ji Hyoun Kang (Korean Entomological Institute, Korea University) ;
  • Yeon Jae Bae (Department of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University)
  • Received : 2024.09.23
  • Accepted : 2024.10.31
  • Published : 2024.11.30

Abstract

The common mayfly genus Ephemera Linnaeus from South Korea was taxonomically reviewed, with emphasis on the sympatric E. orientalis McLachlan and E. sachalinensis Matsumura. A taxonomic key to South Korean Ephemera species is provided for larval and adult stages. The thick and continued pair of dark stripes on mesonotum and presence of pigmentation on abdominal tergum I-II are the diagnostic characters to distinguish E. orientalis from E. sachalinensis in both male and female adults and larvae. In the larvae, the shape and length of foreleg claws, and the shape of posterior margin of tergum X are useful diagnostic characters to distinguish between these two species. In addition, a female specimen deposited in the Hokkaido University Museum, Sapporo, Japan, that was used in the original description of E. sachalinensis by Matsumura in 1911 is designated as the lectotype of the species. A DNA barcoding analysis on the East Asian Ephemera species with paired multi-stripes on the abdominal terga well substantiated their species status.

Keywords

Acknowledgement

We deeply thank Masahiro Ohara and Tatsushi Takayanagi from the Hokkaido University Museum, Sapporo, Japan, who kindly guided us to the type material of E. sachalinensis Matsumura. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (grant number 2022R1A2C1009024, RS-2024-0035046).

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