Journal of Species Research

The National Institute of Biological Resources (국립생물자원관)
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Three newly recorded heterotrophic euglenids(Protist), Entosiphon oblongum, Euglena longa and Keelungia pulex from South Korea

  • Lee, Won Je (Department of Environment and Energy Engineering, Kyungnam University)
  • Received : 2021.11.03
  • Accepted : 2022.02.22
  • Published : 2022.05.31
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Abstract

Three heterotrophic euglenids from marine water column (Seodo port, Yeosu) and freshwater sediment (Seodong-chun, Incheon), Korea were identified as Entosiphon oblongum Cavalier-Smith and Vickerman, 2016; Euglena longa (Pringsheim, 1936) Marin and Melkonian, 2003; and Keelungia pulex Chan and Moestrup, 2013 based on morphological characters and 18S rDNA sequence analysis. These species are reported taxonomically for the first time from Korea and are described with micrographs. Diagnoses of these species are as follows. Entosiphon oblongum: phagotrophic, gliding, size in vivo, 23.1-29.3 ㎛ (Avg. 26.5 ㎛, n=30) long, ovate with a protrusive feeding siphon (apparatus), several deep grooves and two heterodynamic flagella. Euglena longa: osmotrophic, swimming, size in vivo, 32.3-52.2 ㎛ (Avg. 42.2 ㎛, n=26) long, elongated with many paramylum granules and two flagellar. Keelungia pulex: phagotrophic, gliding, size in vivo, 13.5-19.7 ㎛(Avg. 16.4 ㎛, n=97) long, oblong to ovoid with a hook-shaped ingestion apparatus, several dorsal ridges and two flagella.

Keywords

Acknowledgement

This work was funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR202102203; HNIBR 20210111), and from the National Research Foundation (NRF), funded by the Ministry of Science and ICT(NRF-2018R1A2A307556714), Korea.

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