Pseudodifflugia, a testate filose amoeba. These are small species with a chitinoid ovoid or spherical test covered with quartz particles. Difflugia are generally larger and have lobose pseudopodia. Pseudodifflugia feeds on diatoms and other algae. From freshwater koi pond near Boise, Idaho. Phase contrast. 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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Freshwater and Terrestrial Microbes of Idaho (USA) and Elsewhere
|Description of Pseudodifflugia: Small species with agglutinate test, in general appearance similar to Difflugia but with filopodia. Test: firm, chitinoid or completely covered with attached quartz grains. Shape often variable ovoid to subspherical. Feeding: herbivore. Species of this genus can be found in freshwater, soil and marine littoral sands. About 20 species, often with incomplete descriptions. Type species: Pseudodifflugia gracilis Schlumberger, 1845. |