Sphaerocavum: a coccoid morphogenus identical to Microcystis in terms of 16S rDNA and ITS sequence phylogenies - Rigonato, Janaina; Sant’Anna, Celia Leite; Giani, Alessandra; Azevedo, Maria Tereza de Paiva; Gama, Watson A; Viana, Valquiria F. L; Fiore, Marli de Fatima; Werner, Vera Regina (Hydrobiologia, 2018)