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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 300 μm long, 160 μm wide, L/W=1.9, x 200, x 400, x 640, a marsh pond near Ningyo-ishi, east side of Nakadaiten, Azuma mountains, Kitashiobara village, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Stentor Stentor Stentor Stentor
Cell body 260 μm long, 140 μm wide, L/W=1.9, x 200, x 400
Stentor Stentor

Images of collecting locality: a marsh pond near Ningyo-ishi, east side of Nakadaiten, Azuma mountains, Kitashiobara village, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii

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