Patrick in Patrick & Reimer 1966 Category: Araphid
TYPE SPECIES: Hannaea arcus (Ehrenberg) Patrick in Patrick & Reimer
Valves are linear and arched. One or two rimoportulae occur on each valve, located near the valve ends. The ventral (concave) side of the valve has a central swelling. Faint, or ghost striae, are often present near the center of the valve.
Hannaea is characteristic of oligotrophic streams and large lakes, where it grows attached in tufted colonies to benthic surfaces.
Cite This Page:
Spaulding, S., and Edlund, M. (2008). Hannaea. In Diatoms of the United States. Retrieved July 05, 2015, from http://westerndiatoms.colorado.edu/taxa/genus/Hannaea_