Tetraedron gracile (Reinsch) Hansgirg 1889

Division     Chlorophyta
Class     Chlorophyceae
Order     Sphaeropleales
Family    Hydrodictyaceae
Basionym     Polyedrium gracile Reinsch
SynonymIsthmochloron gracile (Reinsch) Skuja; Pseudostaurastrum gracile (Reinsch) Bourrelly.

    Cells rectangular, flat with narrow processes produced at the corners of the cells. Each process usually branch twice and end with short spines. Primary branches usually right angles with one another and parallel to one side of the cell. Cells with processes 35-70 μm in diameter, without processes, 10-24 μm in diameter.


Freshwater alga prefers oligo-mesotrophic water bodies.