Gomphonema vancampianum sp. nov. SEM micrographs taken from the holotype material (BR-4839, Lac du Drapeau, Sample DRAPEAU-U03VEG, France) A SEM internal view of an entire valve B SEM internal detail of the central area with the stigmoid located in a long depression, the hooked central raphe endings and the long foramina with the areolae C SEM internal detail of the areolae with the small silica struts D SEM internal detail of the footpole with the small pseudoseptum, the helictoglossa and the apical pore field E SEM external view of an entire valve with marginal crest from Lac du Réaltor, Provence, France (photo courtesy of Dr Carlos E. Wetzel). Scale bars: 10 µm (A, E), 1 µm (B–D).