Mag. 400x
...rather than M. radiosa var. elegans, which would have narrower lobes, or M. radiosa var. ornata, which would have spines along the margins of the polar lobes. For reference images and descriptions, see https://www.researchgate.net/publication/328845266_Taxonomic_notes_on_the_species_of_the_genus_Micrasterias_Desmidiaceae_Conjugatophyceae_from_the_Metropolitan_Region_of_Salvador_Bahia_Brazil.