Image © Marien van Westen
Euastrum insigne, a species characterized by vase-shaped cells with a broad base and a slender neck
Cell dimensions (L x B): 120 x 65 µm
Euastrum insigne is a characteristic species hardly to be confused with any other European Euastrum. Semicells are vase-shaped with a broad base and a long, slender, upwards dilating neck. At the base of the semicell there is a couple of downwards directed, big, conical protuberances meeting those of the other semicell. The cell wall shows marked pore fields, at the end of the lobes often granulated by excreted material. In the Netherlands, Euastrum insigne is a rare species only incidentally encountered in acidic, oligotrophic bog pools.
Image © Koos Meesters (after Austrian material) mouse over
Another cell of Eu. insigne showing the pronounced, conical protuberances at the base of the semicells
Cell of Eu. insigne in lateral view
Cell of Eu. insigne in apical view
Image © Jan Šťastný
SEM picture of Euastrum insigne, the left cell in oblique lateral view, the right one in frontal view.