Chamaepinnularia soehrensis
(Krasske) Lange-Bertalot & Krammer in Lange-Bertalot & Metzeltin 1996 Category: Symmetrical biraphid
BASIONYM: Navicula soehrensis Krasske 1923
SYNONYM(S): Pinnularia soehrensis (Krasske) Petersen
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Megan Otu | Sarah Spaulding - March 2011
Length Range: 10-12 µm
Width Range: 2 µm
Striae in 10 µm: 18-20
Description
Valves are linear, with triundulate margins and capitate apices. The axial area is narrow and linear. The central area is oval to rectangular, depending on the level of focus. The central nodule is distinctly thickened, compared to other parts of the valve. The raphe is filiform and straight. The striae are slightly radiate to parallel and composed of a single, elongate areola on the valve face. Terminal nodules are distinct.
Original Description
Basionym: Navicula soehrensis
Author: Krasske 1923
Length Range: 12 µm
Width Range: 2 µm
Striae in 10 µm: 24
Original Description
Schalen linear, dreiwellig, Enden leicht kopfig, Länge 12µ, Breite 2µ. Streifen deutlich, ca. 24 in 10 µ. - Fundort: Abfluss des Grubenteiches bei Wattenbach (Söhre bi Cassel). - Die Stellung im System ist noch unsicher, vielleicht zu Pinnularia.
Original Images
Cite This Page:
Otu, M., and Spaulding, S. (2011). Chamaepinnularia soehrensis. In Diatoms of the United States. Retrieved May 21, 2013, from http://westerndiatoms.colorado.edu/taxa/species/chamaepinnularia_soehrensis
Species: Chamaepinnularia soehrensis
Contributor: Megan Otu | Sarah Spaulding
Reviewer: Sam Rushforth
Image Credit: Megan Otu
- Valves are very small
- Margins triundulate
- Striae parallel
Valves are very small, less than 12 µm in length. The margins of the valves are distinctly triundulate with capitate apices. Striae are parallel and relatively broad.
Compare
Chamaepinnularia soehrensis is distinguished from other small species of Chamaepinnularia by its triundulate margin.
Citations
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. 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)
Chamaepinnularia soehrensis CAS
North American Diatom Ecological Database (NADED)
NADED ID: 212006
Autecology Discussion
EMAP Assessment
Sampling for 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). Streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming). Over 1200 sites on 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
Chamaepinnularia soehrensis
Distribution
The distribution map represents the relative abundance of this Chamaepinnularia soehrensis in the western EMAP study. Relative abundance is a measure of the proportion of cells of this species based on a "fixed count" of 300 total diatom cells counted and identified. Each of the western EMAP sample sites is shown, either with a black dot for sites where Chamaepinnularia soehrensis was not recorded, or with a red circle indicating the relative abundance of Chamaepinnularia soehrensis.
Note that the size of the proportional symbols varies between species to help show both abundant and rare species.
Scale for the map to the left
EMAP Response Plots
Chamaepinnularia soehrensis
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.