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.XCII, fig.1,2;
Conferva obliquata (Smith, 1808), Diatoma obliquatum (Lyndgbye, 1819), Biddulphia obliquata (Gray, 1821), Istmia obliquata (Agardh, 1832)
The valves are very big, having rhombish to trapezoid shape, smaller forms can have elliptic shapes, 60-360µm long. Areole have quadratic shapes, 3 in 10µm, the apices blountly rounded.