VAN DE VIJVER, Bart, & Louis BEYENS 2002 (Nov. 1) Staurosira jolinae sp. nov. and Staurosira circula sp. nov. (Bacillariophyceae), two new fragilarioid diatoms from Subantarctica Nova Hedwigia 75(3/4): 319-331, 57 figs., 1 table from Ile de la Possession