Distribution of large branchiopods of rice paddies in Niigata Prefecture, central Japan

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  • 新潟県の水田における大型鰓脚類の分布
  • ニイガタケン ノ スイデン ニ オケル オオガタシキャクルイ ノ ブンプ

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Surveys of large branchiopods of the rice paddies in Niigata Prefecture excluding Sado Island, Japan, were performed to identify the distribution. Five species were found as a result of the surveys conducted in more than 8,000 paddies (cumulative): Caenestheriella gifuensis (Ishikawa), Lepthersteria kawachiensis Ueno, Eulimnadia packardiana Ishikawa, Lynceus biformis (Ishikawa) and Branchinella kugenumaensis (Ishikawa). Of these, C. gifuensis has a continuous wide distribution in the north part of the Echigo Plain with a sharp border in the south, which is corresponding to the historical landscape border.

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