Figs 39–44. Cocconeis diaphana W in Cocconeis molesta Kütz., C. diaphana W.Sm. and C. dirupta W.Greg. (Bacillariophyta): type material, ambiguities and possible synonymies

Figs 39–44. Cocconeis diaphana W.Sm. isolectotype SEM illustration. Mica labelled as "Cocconeis diaphana n.sp., Jersey, Aug. 14. 1852", deposited in the Van Heurck collection in Meise (BR). SV external view with a reduced central area (39, arrow) and striae composed of transversally elongated alveoli (39). SV internal view (40). Note the SV valvocopula (SVVC) with a smooth edge (40, arrowhead). Detail of the SV apex (41). Detail of a broken SV showing the double layered structure of the alveoli (42). RV external view with the central oblong-elongate central area reaching less than ¼ of the valve width (43, arrow). RV internal view with a low and straight helictoglossa (44, arrow) and the RV valvocopula (RVVC) with a smooth edge (44, arrowhead). Scale bars = 10 µm (39, 40, 43–44), 2 µm (41), 1 µm (42).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 13, DOI: 10.5852/ejt.2016.204, http://zenodo.org/record/384007