WETZEL, Carlos E., & Luc ECTOR 2014 (online Dec. 17) Planothidium lagerheimii comb. nov. (Bacillariophyta, Achnanthales) a forgotten diatom from South America Phytotaxa 188(5): 261-267, 20 figs., 1 table based on Cocconeis lagerheimii; incl. Cocconeis rudis and Achnanthes salvadoriana |