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. & Lange-Bertalot H. (1997): "Susswaserflora von Mitteleuropa", Vol.1, fig.108-9,10, p.287; Patric R. & Ch.W. Reimer (1966):"The diatoms of the United States", Vol.1, p.413,414; Podzorski A.C. (1985): "An illustrated and annotatet chack-list of diatoms from the Black River Waterways, St. Elizabet, Jamaica", Pl. 9, fig.2,3; Gasse F. (1986):"East African diatoms", Pl. XIII, fig.5
Navicula oblongella (Naegeli in Kutzing 1849), Diploneis ovalis var. oblongella ((Naegeli) Cleve 1894), Pinularia ovalis (Hilse 1860), Diploneis ovalis (Hilse 1891)
Valve is linear-elliptical to broadly elliptical with rounded ends; central area is rounded, sometimes 1/3 to 1/4 the breadth of the valve; longitudinal canals are narrow, sometimes a little broader about the central area; single row of pores (13-20 in 10µm) are present (usually so placed so as to appear as continuation of alveoli); transverse costae (10-19 in 10µm) are radiate throughout the valve, with single row of alveoli in between costae; length is 10-100µm, breadth 6-35µm
some specimens recorded have been slightly smaller in breadth than type