Morphological and morphometric description of a novel shelled amoeba Arcella gandalfi sp. nov. (Amoebozoa: Arcellinida) from Brazilian continental waters - Féres, Jordana C; Porfírio-Sousa, Alfredo L; Ribeiro, Giulia M; Rocha, Gustavo M; Sterza, José Mauro; Souza, Maria Beatriz G; Soares, Carlos Eduardo A; Lahr, Daniel J. G (Acta Protozoologica, 2016)