Microspora frequently show the presence of darkened, brown bands between adjacent cells.
There are a number of species and mean cell diameter is a guide to species discrimination. Diameters of 8,11, 14, 17, 20 and 22 µm. are found in acid waters. They are most frequently found tangled in moss or other vegetation, although they initially attach to the substrate by means of a single holdfast cell following settlement of the motile zoospore