Wetzel, C. E.; Lange-Bertalot, H.; Morales, E. A.; Bicudo, D. D. C.; Hoffmann, L.; Ector, L. Bicudoa Amazonica Gen. Nov. Et Sp. nov. (Bacillariophyta)—a New Freshwater Diatom from the Amazon Basin With a Complete Raphe Loss in the Eunotioid Lineage. Phytotaxa 2012, 75, 1–18.