Microscopic morphologic identification at the genus level was performed according to Bellinger & Sigee, 2015 [56 ]. Further identification to species levels was accomplished by comparison with the species original descriptions that are available at the AlgaeBase [57 ]. In the case of the as of yet undescribed species, the morphological comparisons were made with the closest strains obtained in the molecular identification step: Desmodesmus sp. MAT2008c [58 (link)]; Micractinium sp. CCAP 211/92 [39 (link)]; Desmodesmus sp. GM4a [59 (link)]. A Carl Zeiss Axio Imager A2 microscope (Zeiss.co, Brazil) equipped with Differential Interference Contrast (DIC) was used for morphological analysis.
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