An optical microscope image of the Arcella gandalfi (right) and a scanning electron micrograph of its shell (left) JORDANA C. FÉRES & ALFREDO L. PORFÍRIO SOUSA (See J.C. Féres et al., “Morphological and Morphometric Description of a Novel Shelled Amoeba Arcella gandalfi sp. nov. (Amoebozoa: Arcellinida) from Brazilian Continental Waters,” Acta Protozoologica, doi:10.4467/16890027AP.16.021.6008, 2016.)
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