Denys, L. and Van Bonn, W. (2001) A second species in the epizoic diatom genus Epipellis: E. heptunei sp. nov. Lange-Bertalot Festschrift, Studies on diatoms. Dedicated to Prof. Dr. Horst Lange-Bertalot on the occasion of 776 his 65th birthday. A.R.G. Gantner Verlag, Ruggell, Liechtenstein.