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Litostomatea: Haptoria: Haptorida: Spathidiidae

Perispira ovum

Perispira Genus: Cell body ovoid or cylindrical; oral ridge turns right-spirally down to posterior end (Kudo, 1966). Oral region spirals around body from anterior to posterior end (Illustrated Guide, 1985).
Species: Cell body ovoid, 30-60 μm long, 20-45 μm wide when starved, well-fed cells 65-120 μm long, 50-110 μm wide; spiral ridge complete turn; cytostome in the anterior end of the ridge, with a number of delicate trichites; macronucleus ovoid to elongate; a single micronucleus; contractile vacuole terminal; fresh water (Kudo, 1966).
Similar genus -->> Spathidium; Bryophyllum;

Perispira ovum, cell body 62 μm long, 40 μm wide, x 640, drainage ditch, Takimamuro, Konosu city, Saitama Pref., Japan, April 17, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Perispira ovum Perispira ovum Perispira ovum

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