This image was taken by William Bourland. He now uses a Zeiss Axioskop 2 with Spot Insight and Spot Flex CCD cameras (Diagnostic Instruments). Image copyright: William Bourland, image used under license to MBL (micro*scope).
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From the collection
Freshwater and Terrestrial Microbes of Idaho (USA) and Elsewhere
|Description of Stentor muelleri: Heterotrich ciliate, 500-1000 micrometres long, rarely up to 3 mm. Colorless, but may appear brownish in transmitted light. With zoochlorellae. Very contractile; slenderly trumpet-shaped when extended, with posterior drawn out into a thin stalk; plumply ovoid when contracted. Peristome wide with a domed central area. Often in loose, gelatinous tube. Macronucleus moniliform, with 10-20 beads. Common, widespread. Mainly in freshwater, but also in estuaries.