Paper is the survey of the order Volvocales in the Parque Estadual das Fontes do Ipiranga Biological Reserve, city of São Paulo, São Paulo State, Brazil. Seven genera (Carteria, Chlamydomonas, Chlorogonium, Chloromonas, Coccomonas, Pandorina, and Pteromonas), with a total of 26 species are identified. Carteria with nine species is the genus with the largest number of taxa in the area, followed by Chlamydomonas with 7, Chlorogonium with 4, Chloromonas and Pteromonas with 2 each, and Coccomonas and Pandorina with a single one. Carteria hiemale Skvortzov, C. lunzensis Pascher & Jahoda, C. plana Pascher, C. wisconsinensis Huber-Pestalozzi, Chlorogonium fusiforme Matvienko and C. gracile Matvienko are the best represented speciesgeographically, occurring in 2 localities each.
Brazil; Chlorophyceae; Volvocales
