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Heterotrichea: Heterotrichida: Stentoridae

 Stentor pyriformis
Johnson 1893

Stentor Species: Colorless; with symbiotic Chlorella; 1-2 mm long when extended; macronucleus beaded; anterior end expanded (Kudo, 1966). Elongate, may attain 1-2 mm; peristome wide; macronucleus moniliform; no somatic bristles; colourless but zoochlorellae may be present (Carey, 1992).
Cell body slenderly trumpet shaped, up to 2 mm long when fully extended; macronucleus moniliform (more than 10 connected beads); cortical granules colourless; with symbiotic green algae (Foissner and Wölfl, 1994).

Stentor pyriformis Johnson 1893, with endosymbiotic algae, cell body 492 μm long, 240 μm wide, L/W=, x 100, x 200, No. 3-1a, Jodo-daira (bog or marsh) , Azuma mountain, Fukushima city, Fukushima Pref., Japan, September 3, 2006 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 polymorphus Stentor polymorphus
Cell body μm long, μm wide, L/W=, x 100, x 200
Stentor polymorphus Stentor polymorphus

Images of collecting locality: No. 3, Jodo-daira (bog or marsh) , Azuma mountain, Fukushima city, Fukushima Pref., Japan, September 3, 2006 by Y. Tsukii

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