FIGURES 191–196. Odontidium rostratum, SEM. MKNDC 2965 in Reinvestigation of the type material for Odontidium hyemale (Roth) Kützing and related species, with description of four new species in the genus Odontidium (Fragilariaceae, Bacillariophyta)

FIGURES 191–196. Odontidium rostratum, SEM. MKNDC 2965, spring near Lake Golemo Pelistersko, Macedonia. 191, 192. View of whole valve and girdle bands. 193. Details of valve face with rimoportula and pore field. 194. View of whole frustule. 195. Details of valve mantle, spines and girdle bands. 196. Internal view of valve. Scale bars = 2 μm (Figs 191, 193, 194), 1 μm (Figs 192, 195, 196).