LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Paula Furey - March 2011
Length Range: 27-45 µm
Width Range: 5.8-6.9 µm
Striae in 10 µm: 12-13 in the center valve
Description
Ventral margin is straight to weakly concave and the dorsal margin is convex and broadly biundulate. Apices are broadly rounded and set off by a change in the slope of the dorsal margin. Helictoglossae are visible in the LM. Raphe with distal ends curved onto the valve surface. Striae are slightly radiate, sometimes with abbreviated striae on the dorsal margin.
Original Description
Basionym:
Author: Furey, Lowe and Johansen 2011
Length Range: 27-45 µm
Width Range: 5.8-6.9 µm
Striae in 10 µm: 12-13 in the center valve
Original Description
Valves straight to weakly concave on the ventral margin, convex and broadly biundulate on the dorsal margin, 27 – 45 μm long, 5.8 – 6.9 wide. Apices broadly rounded, set off by a change in the slope of the dorsal margin. Helictoglossae visible in the light microscope. Raphe with distal ends curved onto the valve surface. Striae slightly radiate, 12 – 13 in 10 μm, sometimes with abbreviated striae on the dorsal margin. Areolae 36-38 in 10 μm.
Original Images
Cite This Page:
Furey, P. (2011). Eunotia boomsma. In Diatoms of the United States. Retrieved April 21, 2018, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_boomsma
Species: Eunotia boomsma
Contributor: Paula Furey
Reviewer: Pat Kociolek
Image Credit: Paula Furey
- Dorsal margin broadly biundulate
- Apices broadly rounded
- Helictoglossae visible in LM
The dorsal margin is biundulate in large to small specimens. The apices are broadly rounded. Helictoglossae are visible in the LM. The striae are slightly radiate.
Compare
Eunotia dorofeyukae and E. implicata are wider. The ventral margin of E. circumborealis is more concave, and the dorsal undulations are more narrow.
Eunotia circumborealis
Lange-Bert. and Nörpel
Eunotia dorofeyukae
Lange-Bert. and Kulikovskiy
Citations
Furey, P.C., Lowe, R.L. and Johansen, J.R. (2011). Eunotia Ehrenberg (Bacillariophyta) of the Great Smoky Mountains National Park, USA. Bibliotheca Diatomologica 56: 1-134.
Krammer, K. and Lange-Bertalot, H. (1991). Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae. In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.
Kulikovskiy, M.S., Lange-Bertalot, H., Witkowski, A., Dorofeyuk, N.I. and Genkal, S.I. (2010). Diatom assemblages from Sphagnum bogs of the world. I. Nur bog in northern Mongolia. Bibliotheca Diatomologica 55: 1-326.
Lange-Bertalot, H. and Metzeltin, D. (1996). Indicators of oligotrophy - 800 taxa representative of three ecologically distinct lake types, Carbonate buffered - Oligodystrophic - Weakly buffered soft water. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 2. Ecology, Diversity, Taxonomy. Koeltz Scientific Books. Königstein, Germany, 2:390 pp.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID:
Autecology Discussion
To date Eunotia boomsma has been found in low numbers, epiphytic on bryophytes, in streams and wet walls in the Great Smoky Mountains National Park.
Images
Type locality:Upper Beard Cane Creek in the Hesse Creek watershed in the Great Smoky Mountains National Park, Blount County, Tennessee.
Credit/Source: Paula C. Furey