Figs 15–20 in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 15–20. Cocconeis molesta Kütz. 15–17. From BM 18381 (15–16: holotype illustration); helictoglossae deflected in opposite directions (15, arrowheads), SV axial rows in a zig-zag pattern (16–17). 18–20. From IX-43-A13 (H.F. Van Heurck collection), RV striation often difficult to observe (18, arrowhead), RV fascia (19, arrowheads), SV axial rows in a zig-zag pattern (20). Scale bars = 10 µm.Published as part of Riaux-Gobin, Catherine, Compère, Pierre, Jordan, Richard W., Coste, Michel, Yesilyurt Criobe-Usr, Jovita C. & Irstea, Japan., 2016, Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies, pp. 1-18 in European Journal of Taxonomy 204 on page 7, DOI: 10.5852/ejt.2016.204, http://zenodo.org/record/384007