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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 7567

M. Pussard, C. Alabouvette, I. Lemaitre, and R. Pons; [Une Nouvelle Amibe Mycophage Endogee Cashia mycophaga n. sp. (Hartmannellidae, Amoebida)]. Protistologica XVI(3):443-451, 1980

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A new mycophagic amoeba was found in two cultivated Lorraine soils (France). It is described as Cashia mycophaga n. sp. (Hartmannellidae). This limax amoeba is characterized by non-eruptive locomotion, by very shallow hyaline cap and by a rather large size (50-70x150-180 µm). The nucleus has a big central endosome. The endoplasm contain bipyramidal cristals and a single contractile vacuole. Double-walled cysts are formed (diam. 45-70 µm). The outer wall is distinctly separated from the inner. C. mycophaga is not bacteriophagic. It feeds on yeasts (Saccharomyces cerevisiae) and fungi (Fusarium; Gliocladium; a Mucorale, possibly Rhizopus sp.). It consumes not only chlamydospores but also mycelium of Fusarium: propagules are totaly dissolved in food vacuoles. This phagocytotic behaviour is very different from that of "perforating" species (Thecamoeba granifera minor and Arachnula impatiens).