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Pseudolithoderma subextensum (Sphacelariales, Phaeophyceae): a new record of crustose brown alga from Korea

  • Antony Otinga Oteng'o (Department of Biological Science, Chosun University) ;
  • Tae Oh Cho (Department of Biological Science, Chosun University) ;
  • Boo Yeon Won (Department of Biological Science, Chosun University)
  • 투고 : 2024.05.20
  • 심사 : 2024.06.14
  • 발행 : 2024.06.30

초록

Pseudolithoderma subextensum is a crustose brown algal species in the family Lithodermataceae and order Sphacelariales. This species is distributed in several regions across the world including, Europe, Western Atlantic, Middle East and Asia (Hong Kong and Japan). Recent floristic surveys along the Korean coastal shores have revealed new records of encrusting brown algae. In this study, we report P. subextensum as a new record from Korea. Morpho-anatomical and molecular studies on Ralfsia-like specimens from Korea identified some of them as P. subextensum. Pseudolithoderma subextensum is characterized by dark chestnut brown crust with a hypothallial basal layer and erect perithallial filaments, tufts of hairs occasionally arising from the basal layer, several discoid shaped chloroplasts per cell, plurangia arising terminally on erect filaments and without sterile cells, and unangia arising terminally on erect filaments, elongated cylindrical and without paraphyses. Phylogenetic analyses based on COI-5P (545bp) reveal that P. subextensum are nested within Lithodermataceae and forms the same clade with P. roscoffense. The genetic divergences for COI-5P between them is 24.5%.

키워드

과제정보

This study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1I1A2059577), by the Ministry of Ocean and Fisheries (Marine Biotics Project, 20210469), and by the National Marine Biodiversity Institute of Korea (the management of Marine Fishery Bio-resources Center 2024) to Tae Oh Cho. This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1I1A1A01051909) to Boo Yeon Won.

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