Hannaea

Patrick in Patrick & Reimer 1966      Category: Araphid
TYPE SPECIES: Hannaea arcus (Ehrenberg) Patrick in Patrick & Reimer

Halamphora

 

Hantzschia

Image Credit: Becky Bixby, Megan Otu

CLASS: Fragilariophyceae
  ORDER: Fragilariales
    FAMILY: Fragilariaceae

  1. Valves arched
  2. Poles capitate to rostrate
  3. Valve with central ventral swelling
  4. 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 tufted colonies to benthic surfaces.

Cite This Page:
Spaulding, S., and Edlund, M. (2008). Hannaea. In Diatoms of the United States. Retrieved December 27, 2014, from http://westerndiatoms.colorado.edu/taxa/genus/Hannaea_

Contributor: Sarah Spaulding | Mark Edlund - December 2008