Quadricilia rotundata (Skuja, 1948) V+rs, 1992. Cells are 5-9 x 10-15 microns, globular cells 10-20 microns in diameter. Cell globular, or nearly so, with 4 (-8) unequal, smooth, acronematic flagella inserted anteriorly in a shallow depression. The flagella are 1-3 times the diameter of the cell body. Many thin, branched pseudopodia may be produced from any point of the cell surface. Cytoplasm sometimes highly vesiculate, nucleus central or in the cell anterior.
