FIGURES 2–16. Stauroneis schinzii var. argentina Frenguelli. Fig. 2 in Revision Of The Type Materials Of Stauroneis Schinzii Var. Argentina Frenguelli And S. Schinzii Var. Maxima Frenguelli (Bacillariophyceae)

FIGURES 2–16. Stauroneis schinzii var. argentina Frenguelli. Fig. 2. Original drawing of Frenguelli (1933, Pl. I, fig. 10). Figs 3–16. LM. Specimens from type population. Figs 5–6. Lectotype, same specimen in different focus. Fig.15. Detail of valve end showing distal raphe fissure. Fig. 16. Detail of valve centre showing sternum and proximal raphe ends. Note the irregularly long striae delimiting the axial area (arrow). Scale bars: 10 µm (Figs 2–14); 5 µm (Figs 15–16).