Chlorophyta
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PHAEOPHYTA (brown algae)
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Sphacelaria arctica
Harvey, 1857
Lenght
: 1-5 cm
Width:
40-70 um
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Thallus
thin filiform, in form of tangled tufts of dark brown colour. Branching irregular, in the upper parts pinnate. All thallus segmented. Occures on stones, in the lower littoral and sublittoral. common. High boreal-Arctic species.