Genus: Test round in cross-section; scales usually adjacent; aperture truncate (Illustrated Guide, 1985). Species: 60-140 μm long; 30-75 μm diam.; neck diam. 12-25 μm; test clear, chitinoid, ovoid, round cross-section; with round adjoining scales in yellow matrix; short cylindrical neck, bent; pseudostome, round, 10-25 μm; pseudopods like Euglypha; nucleus spherical 20-30 μm; synonyms, C. margaritacea, C. myosurus (Illustrated Guide, 1985).

31 μm 63 μm 94 μm; x 640

Cyphoderia ampulla (Ehrenberg 1840) , test about 125 μm long, 45 μm wide, pseudostome 12 μm long, 10 μm wide, scales μm long, μm wide, x 640, Numa-no-hara marsh (Genseikaen), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, May 15, 2005 by Y. Tsukii
31 μm 63 μm 94 μm; x 640