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Contractile vacuole and nucleus

Gocevia spec.

Diagnosis: amoeba more or less spherical in shape, partly or completely surrounded by a distinct hyaline margin; surface with a layer of foreign bodies; hyaline zone often irregular in outline with conical or digiform subpseudopodia and trailing filaments; nucleus spherical with central nucleolus which shows some lacunae.

Dimensions: c. 20 µm

Ecology: fresh water, in sediments of ditches.

Remarks: This species resembles G. binucleata, but differs in size and the structure of the nucleolus.

Several contractile vacuoles and pseudopodia (arrowed)
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