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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 pyriformis Johnson 1893, with endosymbiotic algae, cell body 230 μm long, 125 μm wide, L/W=1.8, x 200, x 400, x 640, Tashirodaira marsh, Hakkoda mountain, Aomori city, Aomori Pref., Japan, July 17, 2005 by Y. Tsukii
scale 200 μm scale 400 μm scale 600 μm; x 100
Stentor Stentor Stentor Stentor

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