RIGONATO, Janaina, Célia L. SANT'ANNA, Alessandra GIANI, M. Teresa P. AZEVEDO, Watson A. GAMA, Valquiria F.L. VIANA, Marli F. FIORE, & Vera R. WERNER 2017 (Sep. 13) ('2018') Sphaerocavum: a coccoid morphogenus identical to Microcystis in terms of 16S rDNA and ITS sequence phylogenies Hydrobiologia 811(1): 35-48, 4 figs., 3 tables