Sargassum boreale & Horiguchi
Sargassum boreale Yoshida & Horiguchi in Yoshida et al. 2000: 126, figs 1-4
Published in: Yoshida, T., Stiger, V. & Horiguchi, T. (2000). Sargassum boreale sp. nov. (Fucales, Phaeophyceae) from Hokkaido, Japan. Phycological Research 48: 125-132.
Status of name
This name is of an entity that is currently accepted taxonomically.
Subgenus Bactrophycus Section Teretia
Origin of species name
Adjective (Latin), north, northern (Stearn 1973).
No synonyms are currently included in AlgaeBase.
This is a marine species.
(as Sargassum boreale Yoshida & Horiguchi)
Japanese: Hokkai-moku (Yoshida, Stiger & Horiguchi 2000).
Holdfast flat conical in shape, 1.4-2 (up to 4) cm in diameter. Stem erect from the centre of holdfast. Stem cylindrical to weakly compressed, up to 7 mm in diameter, with smooth surface, 30 cm long or more when fully grown, usually simple, sometimes once or rarely twice branched. Cauline leaves, formed on the stem at early stage of development before formation of main branches, linear in shape with very short stipe usually about 1 cm long and 2 mm wide. Main branches alternating, issued in one plane at intervals of 1-3 cm, up to 1 m long, cylindrical with smooth surface. Leaves in the lower part of main branches linear in shape, up to 2 cm long and 5 mm wide with entire margins, without midrib, apex acute to obtuse and basal part narrowing to stipe. Leaves becoming narrower and shorter into filiform on the upper part of main branches and lateral branches. Cryptostomata dispersed on leaf surface. Vesicles spherical to slightly obovate, up to 7 mm in diameter, with round apex with cryptostomata on the vesicle. Stipe or vesicle about 2 mm long, much shorter than the diameter of vesicles. Alga dioecious. Male and female receptacles similar in shape, cylindrical, tapering toward apex, up to 11 mm long and 1.5 mm in diameter. Released oospores are 154.2 µm long (SD: 17.3, n = 24) and 103.5 µm wide (SD: 7.2, n = 24)
Holotype locality: Akkeshi, Hokkaido (Yoshida, Stiger & Horiguchi 2000: 126). Holotype: T. Yoshida; 2 December 1995; SAP 062140 (Yoshida, Stiger & Horiguchi 2000: 126). Notes: Isotypes in TNS, L, UC, SNU, PC, BM, AST.
Stiger, V., Horiguchi, T., Yoshida, T., Coleman, A.W. & Masuda, M. (2003). Phylogenetic relationships within the genus Sargassum (Fucales, Phaeophyceae), inferred from it ITS nrDNA, with an emphasis on the taxonomic revision of the genus. Phycological Research 51(1): 1-10.
Created: 10 January 2005 by Sandy Lawson
Verified by: 26 April 2009 by M.D. Guiry
Accesses: This record has been accessed by users 1038 times since it was created.
Verification of data
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(Please note: only references with the binomials in the title are included. The information is from the Literature database.)
Yoshida, T., Stiger, V. & Horiguchi, T. (2000). Sargassum boreale sp. nov. (Fucales, Phaeophyceae) from Hokkaido, Japan. Phycological Research 48: 125-132.
Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=66199
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 January 2019.