Encyonopsis subminuta

Krammer and Reichardt 1997      Category: Asymmetrical biraphid
BASIONYM: Encyonopsis subminuta Krammer and Reichardt 1997

Encyonopsis stafsholtii

 

Entomoneis alata

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Pat Kociolek - March 2011
Length Range: 10-15 µm
Width Range: 3-4 µm
Striae in 10 µm: 23-27

Description

Valves are slightly asymmetrical to the apical axis, with both the dorsal and ventral margins slightly convex. The apices are protracted, relatively narrow and short. The axial area is very narrow, linear. A central area is absent. The raphe is slightly arched, filiform, with external proximal ends dilated slightly. Striae are radiate to nearly parallel.



Original Description

Basionym: Encyonopsis subminuta
Author: Krammer and Reichardt 1997
Length Range: 10-26 µm
Width Range: 3.4-4.5 µm
Striae in 10 µm: 23-26

Original Description

Original Images


Cite This Page:
Kociolek, P. (2011). Encyonopsis subminuta. In Diatoms of the United States. Retrieved September 27, 2016, from http://westerndiatoms.colorado.edu/taxa/species/encyonopsis_subminuta

Species: Encyonopsis subminuta

Contributor: Pat Kociolek

Reviewer: Sam Rushforth

Citations

Krammer, K. (1997). Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica 37:1-469.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Encyonopsis subminuta CAS

North American Diatom Ecological Database (NADED)

NADED ID: 203008

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

Encyonopsis subminuta


EMAP Response Plots

Encyonopsis subminuta


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.