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A new record of larger benthic foraminifera from Jeju Island (South Korea)

  • Somin Lee (Department of Life Science, College of Natural Sciences, Hanyang University) ;
  • Fabrizio Frontalini (Department of Pure and Applied Sciences, Urbino University) ;
  • Wonchoel Lee (Department of Life Science, College of Natural Sciences, Hanyang University)
  • Received : 2023.10.27
  • Accepted : 2023.12.21
  • Published : 2024.02.28

Abstract

Larger benthic foraminifera (LBF) are a group of marine organisms that inhabit oligotrophic subtropicaltropical photic zones, commonly possess relatively large shells (i.e., tests) with a complex internal structure and host photosynthetic endosymbionts. In this study, we provide a new report of a LBF species belonging to the genus Sorites Ehrenberg, 1839, with a brief description and images of the test. The sediment samples were collected by SCUBA diving from the east coast of Jeju Island (South Korea). The discoidal test shape and annular series of chamberlets with a single row of apertures surrounded by rim indicate that these specimens belong to the genus Sorites, and this is the first record of the genus in Korea. The arrangement of early chamberlets, septular disposition, and the aperture details suggest that the specimens can be assigned to Sorites orbiculus(Forsskål in Niebuhr, 1775). Only three LBF species, including the present species, have been reported from Korean waters. The present study provides additional information for the evaluation of foraminiferal diversity including LBF in Korea and suggests the necessity of continuous investigations to understand the diversity of Sorites species in Korea.

Keywords

Acknowledgement

We deeply appreciate prof. Johann Hohenegger, for giving helpful comment on morphological species identification of Sorites orbiculus, and particular thanks to the colleagues who have helped with the sampling via SCUBA. This work was supported by grants from the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment(MOE) of the Republic of Korea (NIBR2012 - Discovery of Korean Indigenous Species, and NIBR202333201).

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