NOVAIS, Maria Helena, Carlos E. WETZEL, Bart VAN DE VIJVER, Maria Manuela MORAIS, Lucien HOFFMANN & Luc ECTOR 2013 (June) (May 29) New species and combinations in the genus Geissleria (Bacillariophyceae) Cryptogamie: Algologie 34(2): 117-148, 102 figs., 4 tables