Eunotia trinacria

Krasske 1929      Category: Eunotioid
BASIONYM: Eunotia trinacria Krasske 1929
SYNONYM(S): Eunotia paludosa var. trinacria (Krasske) Nörpel and Alles in Alles et al. 1991 

Eunotia tetraodon

 

Eunotia triodon

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Paula Furey - March 2012
Length Range: 8-24 µm
Width Range: 1.7-2.6 µm
Striae in 10 µm: 17-23 in the center valve

Description

Valves are elongate-triangular, becoming more linear in larger specimens. Ventral margins are straight to weakly concave. Dorsal margins are slightly convex, with a slight central undulation. Valve ends are weakly subcapitate, subrostrate and not set off, or only slightly set off, from the main part of the valve. Helitoglossae are located close to the apices. Striae are parallel. The areolae are unresolved in the LM. Frustules are rectangular in girdle view.



Original Description

Basionym: Eunotia trinacria
Author: Krasske 1929
Length Range: 4-10 µm
Width Range: 2-4 µm
Striae in 10 µm: 17-22

Original Description

Original Images


Cite This Page:
Furey, P. (2012). Eunotia trinacria. In Diatoms of the United States. Retrieved December 02, 2016, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_trinacria

Species: Eunotia trinacria

Contributor: Paula Furey

Reviewer: Marina Potapova

Citations

Alles, E., Nörpel-Schempp, M. and Lange-Bertalot, H. (1991). Taxonomy and ecology of characteristic Eunotia species in headwaters with low electric conductivity. Nova Hedwigia. 53: 171-213.

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.

Krasske, G. (1929). Beiträge zur Kenntnis der Diatomeenflora Sachsens. Botanisches Archiv 27(3/4): 348-380.

Lange-Bertalot, H., Bak, M., Witkowski, A. and Tagliaventi, N. (2011). Eunotia and some related genera. Diatoms of the European Inland Waters and Comparable Habitats. 6: 747 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Eunotia trinacria CAS

North American Diatom Ecological Database (NADED)

NADED ID: 33212

Autecology Discussion

Found in streams, wetwalls, waterfalls, and sink holes, often associated with bryophytes.

EMAP Assessment

The Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Over 1200 streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.


EMAP Distribution

Eunotia trinacria


EMAP Response Plots

Eunotia trinacria


EMAP citations

Results are published in:

Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.

Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.

Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.