ABSTRACT
This work is the result of a taxonomic study of three genera of pigmented Euglenophyceae in the Área de Proteção Ambiental do rio Ibirapuitã, located in the southwest of the Pampa Biome, where the climate is subtropical. Four samplings were carried out between March 2011 and May 2013 covering 10 sites, six at Ibirapuitã River and four in surrounding environments. Qualitative analysis resulted in the identification of 33 specific and infraspecific taxa, one of Cryptoglena, two of Monomorphina, and 30 of Phacus. We recorded Phacus formosus and P. triqueter, which are first reports for Rio Grande do Sul State. Despite the high diversity and species richness in some places, most taxa had infrequent distribution (61%). Phacus curvicauda Swir, P. hamatus Pochm, P. longicauda (Ehr.) Duj. var. longicauda, P. orbicularis var. orbicularis Hübner, and P. tortus (Lemm.) Skv. were frequent (totaling 15%), while the others were sporadic.
Keywords:
Euglenophyta; Pampa Biome; South of Brazil; taxonomy
