Figs 67–73 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species

Figs 67–73. Ferocia houkiana Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS284 (BR-4578). 67–68. Two external valve face views with the typical spines, the rounded to slit like areolae and the Müller step. 69. External girdle view of a valve lacking the typical central ring of spines. Note the spines vestiges that are present in the central area. 70. Internal view of an entire valve showing clearly the central rimoportulae (arrow) and the small central area. 71. Internal view of an entire valve showing clearly the submarginal rimoportulae (arrows). 72. Internal detail of the valve with one rimoportula indicated by the arrow. 73. Internal detail of the valve central area with the central rimoportula. Scale bars: 67, 69–70 = 10 μm; 68, 71 = 5 μm; 72–73 = 1 μm.Published as part of Goeyers, Charlotte & Vijver, Bart Van De, 2020, Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species, pp. 1-30 in European Journal of Taxonomy 694 on page 11, DOI: 10.5852/ejt.2020.694, http://zenodo.org/record/397334