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Detail of Polychaos dubium, a large polypodial naked amoeba. P. dubium is the type species. Palmate form. Pseudopodia lack the longitudinal ridges seen in Amoeba species. The posterior is composed of a collection of fused remnant pseudopodia. May become monopodial during rapid locomotion. The granular nucleus is spherical to ovoid in shape. The cytoplasm contains ingested algae and numerous refractile crystals. This image shows a large bipyramidal cytoplasmic crystal, probably composed of urea. From freshwater pond near Boise, Idaho. DIC optics.
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Portrait of Polychaos dubium, a large polypodial naked amoeba. P. dubium is the type species. Palmate form. Pseudopodia lack the longitudinal ridges seen in species of Amoeba. The posterior (left side of image) is composed of a collection of fused remnant pseudopodia. May become monopodial during rapid locomotion. The granular nucleus is spherical to ovoid in shape. A large contractile vacuole is visible. The cytoplasm contains ingested algae and numerous refractile crystals. From freshwater pond near Boise, Idaho. DIC optics.
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Canencia, Madrid, Spain
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Hoyo de Manzanares, Madrid, Spain
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Canencia, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Rancho de la Herradura, Andalusia, Spain