| skeletonema costatum | | Japan:Fukuoka, Kitakyushu, Dokai Bay | | 642941622 |
| skeletonema costatum | | Japan:Fukuoka, Chikugo River | | 1096069254 |
| skeletonema costatum | | Japan:Fukuoka, Kitakyushu, Dokai Bay | | 1158966901 |
| skeletonema costatum | | Japan:Fukuoka, Kitakyushu, Dokai Bay | | 1158966907 |