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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, soon after cell division (?), lorica 60 μm long, 22 μm wide, L/W=2.7, cell body 70 μm long, 13 μm wide, L/W=5.4, peristome 19 μm wide, x 640, Kurome river, Asaka city, Saitama Pref., Japan, January 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cothurnia Cothurnia Cothurnia

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