WETZEL, C. E. and ECTOR, L. (2014) “<em>Planothidium lagerheimii comb. nov.</em> (Bacillariophyta, Achnanthales) a forgotten diatom from South America”, Phytotaxa, 188(5), pp. 261–267. doi: 10.11646/phytotaxa.188.5.3.