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.
Krammer K. (1997):"Die cymbelloiden diatomeen. Eine monographie der weltweit bekannten taxa. Teil.2. Encyonema part., Encyonopsis and Cymbellopsis", pg.91,92, Fig.143:1,4,5,8-25, ; Krammer K. & Lange-Bertalot H. (1997): "Susswaserflora von Mitteleuropa", Vol.1, Taf. 134, fig.23-32, p.327; Patric R. & Ch.W. Reimer (1966):"The diatoms of the United States", Vol.2, Pl.4, fig.12a-13b, pg.33,34; Podzorski A.C. (1985): "An illustrated and annotatet chack-list of diatoms from the Black River Waterways, St. Elizabet, Jamaica", Pl.18, fig.4;
Cymbella microcephala (Grunow in Van Heurck 1880-1885), (?)Cymbella minuscula (Grunow 1875 in A. Schmidt et al. 1874-1959), (/)Cymbella microcephala f. major (Grunow in Van Heurck Syn., Atlas 1880-81), Cymbella ruttnerri (Hustedt 1931), Navicula incompta (Krasske 1932)
Valve is slightly to very slightly dorsi-ventral, with convex dorsal margin and straight or convex ventral margin, and rostrate or capitate ends; axial area is narrow with inconspicuous central area; raphe is filiform, with narrowly arched branches (proximal branches are somewhat dorsally inclined), and ventrally curved (somewhat indistinguishable) distal ends; indistinctly lineate striae are variable, parallel or slightly radiate in valve centre, slightly to moderately radiate near the ends; length is 10-20µm, breadth is 2.5-4µm (Hustedt  gives length up to 30µm); striae count is 20-25 in 10µm (around the centre) becoming 26-30 in 10µm (near the ends); Krammer (1997) describes this species as having 38-42 punctae in 10µm
some specimens have higher recorded lengths and breadths than type