Fragilaria sp. (オビケイソウ, right) & Amphora sp. (ニセクチビルケイソウ, left; Raphidineae),
by Naoki Sugiyama
Fragilaria sp. (オビケイソウ)or Nitzschia (ニッチア), x400, at Lake Yamanaka, at Lake Yamanaka, by Naoki Sugiyama
Surire sp. (コバンケイソウ), x200, at Lake Shoji, by Naoki Sugiyama
100 um
200 um
300 um; x 200