Staurastrum hystrix

Image © Marien van Westen

Triradiate cell of S. hystrix in frontal view.

Cell dimensions (L x B, exclusive of spines): ca 25 x 20 µm

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Desmid of the month
June 2010

Staurastrum hystrix

S. hystrix belongs to a group of Staurastra characterized by marked cell wall spines. In S. hystrix those spines are not equally distributed over the cell wall but confined to the end of the semicell lobes. Also characteristic of this species are the shape of the semicells (about oblong in frontal view) and the open, acute-angled sinus. Cells are 3- or 4-radiate (to be checked in top view!). In the Netherlands S. hystrix is of occasional occurrence in acidic, oligotrophic bogs and moorland pools.

Mouse-over image © Koos Meesters (after Austrian material )

Quadriradiate cell of S. hystrix in frontal view.

Staurastrum hystrix, quadriradiate in apical view Image © Koos Meesters
(after Austrian material )

Quadriradiate cell of S. hystrix in apical view.

Staurastrum hystrix, triradiate in apical view Image © Marien van Westen
(after Austrian material )

Triradiate cell of S. hystrix in apical view. Notice that the spines are confined to the end of the semicell lobes.