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.22, Pl. 3:3,4;
Actinoptychus undulatus (Bailey) Ralfs in Pritchard, 1861)
Valve divided into sectors, alternaly elevated or depressed , which terminate shortly from the middle forming a structureless central area, hexagonal in outline central area, each of the elevated sectors possesses a labiate process with external tube. Areolation coarse and irregular, 4-10 in 10µm.