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 MM.H. et M. (1897 - 1908):"Diatoms of France (Atlas)", Pl. XLVIII, fig.9;
Amphiprora maxima (Janish & Rabenhorst, 1862), Toxonidea leavis (Witt, 1873), Amphora permagna (Pantocsek, 1889), Amphora arenaria var. permagna (Pantocsek 1889) Peragallo at Peragallo, 1933)
Valves linear with broadly rounded poles. Dorsal margin flattened, ventral margin slightly concave. Raphe branches abruptly arched in one part start to slope downwards the central nodule. 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. Transapical striae delicately punctate; more or less parallel at the central part, becoming slightly curved toward the ends.
77.5 - 94.3 µm
15.3 - 16 µm