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Hydrosera (Bacillariophyceae)

Hydrosera triquetra from Kasen park, Nasu-shiobara city, Tochigi Pref., Japan, cells in girdle view are attached on all three corners valve to valve by mucilage pads.
Photograph by © Y. Tsukii from Protist Information Server, Japan, posted online

Hydrosera triquetra
SEM of a cell in valve (left) and girdle (right) views, by © Coste and © Ector, posted online.

Coste, M. and L. Ector. 2000. Diatoms invasive exotic or rare in France: major observations over the past decades. Syst. Geogr. Pl 70, 373-400.

Hydrosera triquetra from the Tamar River in Tasmania, Australia
Photograph by © 'Paule' posted online

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