Spaulding, S.,
Edlund, M.
(2008).
Thalassiosira.
In Diatoms of North America.
Retrieved October 14, 2024, from https://diatoms.org/genera/thalassiosira
Centric
Thalassiosira
Valve face flat or tangentially undulate
Fultoportulae one to several near the center valve
Valve margin with spines or occluded processes
Mantle narrow
The valve face of most freshwater species of Thalassiosira is flat, although some are tangentially undulate. The mantle is usually relatively narrow. Striae are radial and not arranged in fascicles. Marginal fultoportulae are positioned near marginal spines, or occluded processes. One to several fultoportulae are also located near the...