Sargassum boreale sp. nov. (Fucales, Phaeophyceae) from Hokkaido, Japan |
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Authors: | Tadao Yoshida,Valé rie Stiger,Takeo Horiguchi |
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Affiliation: | Division of Biological Sciences, Graduate School of Science, Hokkaido University, Kita-10, Nishi-8, Sapporo 060–0810, Japan |
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Abstract: | A new species, Sargassum boreale Yoshida et Horiguchi is described. It belongs to the subgenus Bactrophycus section Teretia, with cylindrical receptacles and is distinct from Sargassum confusum C. Agardh, S. pallidum (Turner) C. Agardh and Sargassum microceratium (Turner) C. Agardh in having a rather elongated stem with smooth surface and distantly issuing main branches, with narrow leaves. The distinction between S. boreale and these species is also revealed by a difference in internal transcribed spacer 2 (ITS‐2) sequences. In addition to the base substitutions, the existence of a large gap in S. boreale distinguishes this species from others. Sargassum boreale is distributed around Hokkaido and Saghalien to 50°N latitude. A key to the species of section Teretia is provided. |
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Keywords: | Fucales ITS-2 Phaeophyceae Sargassaceae Sargassum boreale sp. nov. taxonomy |
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