Morphological and Morphometric Description of a Novel Shelled Amoeba Arcella gandalfi sp. nov. (Amoebozoa: Arcellinida) from Brazilian Continental Waters

Jordana C. FÉRES ； Alfredo L. PORFÍRIO-SOUSA ； Giulia M. RIBEIRO ； Gustavo M. ROCHA ； José Mauro STERZA ； Maria Beatriz G. SOUZA ； Carlos Eduardo A. SOARES ； Daniel J. G. LAHR

《Acta Protozoologica》 55卷4期 (2016/12) Pp. 221-229

https://doi.org/10.4467/16890027AP.16.021.6008

摘要

Arcellinida are free-living lobose amoebae that produce an outer shell (test). Here, we describe a conspicuous new species, Arcellagandalfi sp. nov, from Brazilian continental waters, along with a morphological and biometrical characterization. Test diameter andtest height are on average 81 and 71 respectively. This new species has an apical conical extension, which differentiates it from other Arcellaspecies. A. gandalfi seems to be closely-related to A. brasiliensis, due to the distinct marginal ring (test brim) present only in these twospecies. Since A. gandalfi is easily identified by morphological features and due to its apparent geographic restriction to South America, wediscuss its possible use as a new flagship species.

關鍵字

Testate amoeba ； new species ； morphology ； morphometry ； flagship species