FIG. 4 in A new Nitzschia Hassall species (Bacillariaceae, Bacillariophyta) from saline ponds in Serbia

FIG. 4. — Nitzschia austriaca Hust. SEM and LM images taken from Bela Bara saline pond. A-C, SEM external valve views of a frustule; C, arrow indicates more widely spaced center fibulae; D-W, LM valve views of a population arranged in decreasing length. Scale bars: A-C, 5 µm; D-W, 10 µm.