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.
Witkowski et al. (2000). Iconographia Diatomologica (Vol.VII). Diatom flora of marine coast. Part 1. pg.96, Pl. 51:17,18;
Achnanthes biceps (Hustedt, 1959), Achnanthes pseudobiceps (Hakansson, 1974)
Valves broadly elliptical with protracted slightly capitated apices, 9-13.5µm long, 5.5-6.5µm broad, RLV:sternum widened, dtrongly lanceotated in the middle, transapical striae radiate, located in the marginal part, 23-30 in 10µm.