Genus: cell body flat, constricted at the center; semicell ellipsoidal or subtriangular, central area of the apex slightly elevated,
cells connected with each other at their central area of apex forming filament.
cell body 15 μm long, 12 μm wide,
x 640, Goryo (Mitama) shrine, Sanda city, Hyogo Pref., Japan, November 2001 by Y. Tsukii
94 μm; x 640