Hannaea
Patrick in Patrick & Reimer 1966 Category: Araphid
TYPE SPECIES: Hannaea arcus (Ehrenberg) Patrick in Patrick & Reimer
Image Credit: Becky Bixby, Megan Otu
CLASS: Fragilariophyceae
ORDER: Fragilariales
FAMILY: Fragilariaceae
- 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 tufted colonies to benthic surfaces.
Cite This Page:
Spaulding, S., and Edlund, M. (2009). Hannaea. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Hannaea_
Contributor: Sarah Spaulding | Mark Edlund - January 2009
Reviewer: Sam Rushforth
Citations
Antoniades, D., Douglas, M.S.V. and Smol, J.P. (2009). Biogeographic distributions and environmental controls of stream diatoms in the Canadian Arctic Archipelago. Botany 87: 443–454. 10.1139/B09-001
Bixby, R.J. and Jahn, R. (2005). Hannaea arcus (Ehrenberg) R.M. Patrick: lectotypification and nomenclatural history. Diatom Research 20: 210-226.
Bixby, R.J., Edlund, M.B., and Stoermer, E.F. (2005). Hannaea superiorensis sp. nov., an endemic diatom from the Laurentian Great Lakes. Diatom Research 20: 227–240.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.