FIGURES 52–76 in Three new araphid diatoms (Bacillariophyta) from the Maritime Antarctic Region

FIGURES 52–76: Staurosirella frigida Van de Vijver & E.Morales sp. nov. All pictures taken from the holotype population (sample BY047). Figs 52–69. LM images. Fig. 69 shows a girdle view whereas Figs 52–68 show valve views. Figs 70–76: SEM images. Fig. 70: External view of an entire valve showing the linking spines, the striae and part of the girdle. Fig. 71: Entire frustule linked to another valve showing the linking spines, parts of the girdle bands and the mantle. Fig. 72: Detail of the apical pore field at the foot pole, separated from the striae. Fig. 73: Detail of the apical pore field at the head pole showing 2 rows of small, rounded poroids. Fig. 74: Detail of the slit-like areolae. Fig. 75: Internal view of an entire valve. Fig. 76: Valvocopula with the fimbriate edges. Scale bar represents 10 µm except for Figs 72–74 where scale bar = 1µm.