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.
Pinnularia cf. gigas
Krammer, K. (1992). Pinnularia eine Monographie der europäischen Taxa. in: Bibliotheca Diatomologica 26, pp. 154; 318-319 [t.64:1-5]
Pinnularia dactylus Ehr. 1854
Valve is linear, with slightly tumid centre, and bluntly rounded apices that may taper into bluntly wedge-shaped ends; terminal clear areas at valve ends are about 1/2 the valve breadth; axial area is wide, leading into a narrowly circular central area; raphe is lateral, slightly wavy, but never complex, and central pore is small and round; striae are radial to parallel (short) in the middle, becoming more parallel, then slightly convergent at the ends; length is 160-320µm, breadth is 30-50µm; striae count is 4-5 in 10µm