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.
Peragallo & Peragallo (1897 - 1908). Diatoms of France (Atlas), PL.XLIX, fig.7;
Valves linear with broadly rounded ends. Dorsal margin arcuate; ventral margin straight or slightly concave. Raphe branches abruptly arched. Proximal and distal ends oriented ventrally. Axial area very narrow; central area on the dorsal side very small, on the ventral side semi-circular or semi-lanceolate. Dorsal striae delicately punctate more or less parallel near the center becoming radiate towards the ends; the central striae farther apart from each other. Ventral striae well visible under LM parallel near the center becoming radiate towards the ends.
Rare on seagrass at Nine Mille Bank, Florida Bay where water level is < 1.5m and salinity ranges between 30 and 40ppt.
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