POTAPOVA, Marina 2013 (March) The types of 22 Navicula (Bacillariophyta) species described by Ruth Patrick Proceedings of the Academy of Natural Sciences of Philadelphia 162: 1-23, 92 figs., 1 table Hippodonta dulcis, Hippodonta gravistriata, Fallacia latelongitudinalis, Fallacia duomedia, Sellaphora subfasciata, Sellaphora secura