This paper aims at the taxonomic knowledge of net phytoplankton of "Lagoa do Campelo" in Campos, State of Rio de Janeiro, Brazil. Surface samples were collected in January 1983 (rain period) and in September 1983 (dry period). Forty two taxa were identified to specific and infraspecific levels; 8 of these are recorded for the first time for the State.
Taxonomy; net phytoplankton; "Lagoa do Campelo"