Welcome to the Diatom Image Database! The Periphyton Group at Florida International University created and maintains the Diatom Image Database, which includes over 980 diatom taxa found in the greater Everglades region of south Florida. Please send questions or comments about the Diatom Image Database to Franco Tobias .
You can also click on one of labeled areas on the map to browse by location.
Witkowski et al. (2000). Iconographia Diatomologica (Vol.VII). Diatom flora of marine coast. Part 1. pg.138, Pl.167:7;
Valve lunate with sub-acute apices, 37-95µm long, 8-11µm broad. Dorsal margin smoothly arched; ventral margin concave. Raphe biarcuate, located close to the ventral margin. Raphe branches gently sloping upwards from the poles towards central nodule. Proximal and distal ends dorsally bent. Axial area on the dorsal side unilaterally widened, on the ventral side narrow. Central area on the dorsal side big, on the ventral side developed reaching the margin. Dorsal striae slightly radiate near the centre, becoming stronger radiate towards the poles, crossed by longitudinal line, which can be more or less visible depending on position of the valve, 18-26 in 10µm. Ventral striae interrupted at the centre, well visible under LM..