Eunotia microcephala

Krasske 1932      Category: Eunotioid
BASIONYM: Eunotia microcephala Krasske 1932

Eunotia macroglossa

 

Eunotia montuosa

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Paula Furey - March 2012
Length Range: 13-16 µm
Width Range: 1.9-2.1 µm
Striae in 10 µm: 18-22 in the center valve

Description

Frustules are narrow and rectangularles in girdle view. Ventral margins are weakly concave, with two slight swellings marking the position of the proximal raphe ends. Dorsal margins are irregular and ly weakly triundulate, with the central undulation most prominent. Valve ends are protracted and capitate to subcapitate. Helitoglossae are located close to the apices. The rRaphe extends in a short curve on to the valve face. Striae are parallel. The areolae are unresolved in the LM. One apical rimoportula located just above the center of the apex.



Original Description

Basionym: Eunotia microcephala
Author: Krasske 1932
Length Range: 10-15 µm
Width Range: 2-3 µm
Striae in 10 µm: 18-22

Original Description

Original Images


Cite This Page:
Furey, P. (2012). Eunotia microcephala. In Diatoms of the United States. Retrieved October 24, 2014, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_microcephala

Species: Eunotia microcephala

Contributor: Paula Furey

Reviewer: Marina Potapova

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.

Krasske, G. (1923). Die Diatomeen des Casseler Beckens und seiner Randgebirge, nebst einigen wichtigen funden aus Niederhessen. Botanisches Archiv. Konigsberg 3(4):185-209.

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)

California Academy of Sciences (CAS)

Eunotia microcephala CAS

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

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 microcephala


EMAP Response Plots

Eunotia microcephala


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.