Family: Test rigid, chitinoid, oval to flask-shaped, clear; pseudostome terminal (Illustrated Guide, 1985).
Genus: Test ovate; discoid in cross-section; pseudostome round, oval or elliptical (Illustrated Guide, 1985).
->> Description at WPRNO Google Image Search
C. oviformis
17 x 14 μm
Japan, 1999
C. oviformis
16 x 13 μm
Kiyose
Tokyo, 2001
C. oviformis ?
17 x 12 μm
Omine-numa
Tsukiyono
Gunma, 2003
