FIGURES 26–51 in Three new araphid diatoms (Bacillariophyta) from the Maritime Antarctic Region

FIGURES 26–51: Staurosirella antarctica Van de Vijver & E.Morales sp. nov. All pictures taken from the holotype population (sample BY049). Figs 26–45. LM images. Fig. 45 shows a girdle view, whereas Figs 26–44 show valve views. Figs 46–51: SEM images. Fig. 46: Two entire frustules showing the linking spines, parts of the girdle bands and the mantle. Fig. 47: External view of an entire valve showing the heteropolar valve outline, the linking spines, the apical pore field and the striae. Fig. 48: Detail of the striae with slit-like areolae. Spines are positioned between the striae. Fig. 49: Detail of the apical pore field at the head pole showing 2 rows of small, rounded poroids separated from the striae. Fig. 50: Internal view of an entire valve. Fig. 51: External detail of the apical pore field at the foot pole. Scale bar represents 10 µm except for Figs 48, 49, 51 where scale bar = 1µm.