Copromyxa vandevyveri
C. vandevyveri – from Van Wichelen et al., 2016

Copromyxa vandevyveri Van Wichelen et Vanormelingen, 2016

Diagnosis: Locomotive amoebae limax-shaped, 20–55 µm long and 8–25 µm wide, displaying anteriorly a well pronounced hyaline cap. Bipodial and multipodial movement common by means of alternating sprouting (eruptive) lobes. Pseudopodia often displaying a few small, sprouting, short-lived subpseudopodia laterally. Occasionally a few adhesive uroidal filaments present. Vesicular nucleus 4–8 µm long and 4–7 µm wide with one centrally to slightly eccentrically located globular nucleolus. Usually one contractile vacuole posteriorly. Cytoplasm contains up to 20 small crystals. Floating forms spherical to irregular, about 15–20 µm in diameter with radially up to 12 small hyaline lobes. Spherical cyst occasionally present.

Ecology: Freshwater. Grazing on Microcystis cells was observed in a Microcystis bloom sample and in laboratory cultures.

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