A report of <I>Didymosphenia geminata</I> (Lyngb. ) Mart. Schmidt from Hokkaido, Japan, and its comparison with Icelandic and Mongolian individuals

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Other Title
  • <I>Didymosphenia geminata</I> (Lyngb. ) Mart. Schmidtの北海道での産出,およびアイスランド産,モンゴル産の個体との比較
  • Didymosphenia geminata Lyngb Mart Schmidt ノ ホッカイドウ デ ノ サンシュツ オヨビ アイスランドサン モンゴルサン ノ コタイ ト ノ ヒカク

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Description

Didymosphenia geminata (Lyngb. ) Mart. Schmidt has been found in the River Izari near Lake Shikotsu, Hokkaido, Japan. The sampling point is truly riverine and so might be representive of its natural distribution. The ultrastructure of these individuals was compared with Icelandic and Mongolian individuals using an SEM. Though the densities of striae and areolae show much variation, the ultrastructure of the areolae are identical and so the individuals are thought to be part of the variation of a single taxon. Another small Didymosphenia taxon, which has one stigma, has very different form of areola from D. geminata.

Journal

  • Diatom

    Diatom 24 (0), 80-85, 2008

    The Japanese Society of Diatomology

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