Spaulding, S.,
Edlund, M.
(2008).
Hannaea.
In Diatoms of North America.
Retrieved October 10, 2024, from https://diatoms.org/genera/hannaea_
Araphid
Hannaea
Valves arched
Poles capitate to rostrate
Valve with central ventral swelling
Faint (ghost) striae near central swelling
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...