TY - JOUR TI - Morphological and Morphometric Description of a Novel Shelled Amoeba Arcella gandalfi sp. nov. (Amoebozoa: Arcellinida) from Brazilian Continental Waters AU - Féres, Jordana C. AU - Porfírio-Sousa, Alfredo L. AU - Ribeiro, Giulia M. AU - Rocha, Gustavo M. AU - Sterza, José Mauro AU - Souza, Maria Beatriz G. AU - Soares, Carlos Eduardo A. AU - Lahr, Daniel J. G. TI - Morphological and Morphometric Description of a Novel Shelled Amoeba Arcella gandalfi sp. nov. (Amoebozoa: Arcellinida) from Brazilian Continental Waters AB - Arcellinida are free-living lobose amoebae that produce an outer shell (test). Here, we describe a conspicuous new species, Arcella gandalfi sp. nov, from Brazilian continental waters, along with a morphological and biometrical characterization. Test diameter and test height are on average 81 and 71 respectively. This new species has an apical conical extension, which differentiates it from other Arcella species. A. gandalfi seems to be closely-related to A. brasiliensis, due to the distinct marginal ring (test brim) present only in these two species. Since A. gandalfi is easily identified by morphological features and due to its apparent geographic restriction to South America, we discuss its possible use as a new flagship species. VL - 2016 IS - Volume 55, Issue 4 PY - 2016 SN - 0065-1583 C1 - 1689-0027 SP - 221 EP - 229 DO - 10.4467/16890027AP.16.021.6008 UR - https://ejournals.eu/en/journal/acta-protozoologica/article/morphological-and-morphometric-description-of-a-novel-shelled-amoeba-arcella-gandalfi-sp-nov-amoebozoa-arcellinida-from-brazilian-continental-waters KW - Testate amoeba KW - new species KW - morphology KW - morphometry KW - flagship species