国立科学博物館・植物研究部
国立環境研究所・生物多様性領域
広島県環境保健協会
滋賀県立琵琶湖博物館
2022 年 38 巻 p. 14-17
We report recent occurrences of Fragilaria longifusiformis ssp. eurofusiformis Lange-Bertalot & S. Ulrich from Japanese lakes. This diatom was firstly found from Uokiri Dam Reservoir on the Yahata River, Hiroshima in 2011, followed by Lake Kasumigaura, Ibaraki in 2014 and Lake Biwa, Shiga in 2021. It is considered to be introduced into Japan around 2010. We displayed morphological characters of Japanese specimens and distinguishing points from other confusing species.