Wallich 1858 Category: Centric
TYPE SPECIES: Hydrosera triquetra Wallich
Hydrosera is a large multipolar, centric diatom. Frustules are heavily silicified. Valve margins appear to be in the shape of two superimposed triangles. Porefields, containing ocelli, are positioned at the three poles of one of the apparent triangles. Frustules form large zig-zag colonies, joined by mucilage secreted from the porefields.
Hydrosera grows in streams of southern coastal areas and tropical islands. The colonies are benthic and anchored to the substrate by attachment of the terminal cell.
Cite This Page:
Spaulding, S., and Edlund, M. (2008). Hydrosera. In Diatoms of the United States. Retrieved February 21, 2017, from http://westerndiatoms.colorado.edu/taxa/genus/Hydrosera