Family: Unicells; cell wall present; two flagella (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Cell body similar to Chloromonas, ellipsoidal, ovoid, cylindrical, or spherical in shape; cellwall thick; one or two gelatinous sheath present; papilla mostly distinct, domed or rounded (sometimes with tubular structures, flagella emerging from such tubes); chloroplast cup-shaped or perforated; pyrenoids absent; stimga mostly present; two apical contractile vacuoles present; two flagella emerging from different remote points on apical cell surface; nucleus at/near the center of the cell body (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

G. tecta 3 clips μm Handa numa Ohtawara Tochigi, 1999