Species: Lorica cylindrical, anterior end rounded, posterior end conically tapering into a stout projection; lateral sides nearly straight or slightly swelled; flagellum apertures with a low collar having a circle of spines; wall covered with short spines; 36-40 μm long, 16-18.5 μm wide (Photomicrographs of the Fresh-water Algae, vol.6, 1987).

31 μm 63 μm 94 μm; x 640