WETZEL, C. E.; DE VIJVER, B. V.; HOFFMANN, L.; ECTOR, L. <em>Planothidium Incuriatum Sp. Nov. </em>a Widely Distributed Diatom Species (Bacillariophyta) and Type Analysis of<em> Planothidium biporomum</Em>. Phytotaxa 2013, 138, 43–57.