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Oligohymenophorea: Peritrichia: Vaginicolidae

 Cothurnia annulata
Stokes

Cothurnia annulata Genus (Ehrenberg, 1831): Lorica attached aborally by stalk; no operculum (Illustrated Guide, 1985). Similar to Vaginicola, but lorica stands on a short stalk; fresh or salt water (Kudo, 1966).
Species: Lorica about 55 μm high; fresh water (Kudo, 1966). Middle of cell body, a ring-like elevation.
Similar Genus ->> Thuricola; Vaginicola; Pyxicola; Platycola

Cothurnia annulata Stokes, cell body 80 μm long, 13 μm wide, L/W=6.2, peristome 20 μm wide, lorica 65 μm long, 25 μm wide, L/W=2.6, stalk about 5 μm long, ring of elevation present at the middle of the cell body, x 400, x 640, Owada Park, Saitama city, Saitama Pref., Japan, April 3, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cothurnia annulata Cothurnia annulata Cothurnia annulata Cothurnia annulata

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