Taxonomic survey of the Tetrasporales and Siphonocladales occurring in the ecosystems of Parque Estadual das Fontes do Ipiranga. Two genera of Tetrasporales (Tetrasporaceae, Chaetopeltis and Tetraspora), and three of Siphonocladales (Cladophoraceae, Cladophora, Pithophora and Rhizoclonium) were identified, each with a single species. Ninféias Pond was the system with the highest species richness, including representatives of all species presently identified, except for Tetraspora cylindrica. The hydrophytoterium had specimens of Tetraspora cylindrica, Pithophora roettleri and Rhizoclonium hieroglyphicum.
Brazil; Chlorophyceae; floristic survey
