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Heterotrichea: Heterotrichida: Stentoridae

 Stentor pyriformis
Johnson 1893

Stentor Species: Cell body broadly trumpet shaped, up to 700 μm long when fully extended; macronucleus consists of two (rarely one, three, four or five) isolated beads; cortical granules colourless; with symbiotic green algae (Foissner and Wölfl, 1994).

Stentor sp., cell body with endosymbiotic Chlorella, μm long, x 100, Niigata Pref., Japan, May 2001, collected by N. Kinoshita, photo by Y. Tsukii
scale 200 μm scale 400 μm scale 600 μm; x 100
Stentor

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