Nitzschia sinuata

(Thwaites in W. Smith) Grunow in Cleve and Grunow 1880      Category: Nitzschioid
BASIONYM: Denticula sinuata Thwaites in W. Smith 1856

REPORTED AS: Nitzschia sinuata (Krammer and Lange-Bertalot 1988, p. 52, fig. 40: 1-4.) 

Nitzschia sigma

 

Nitzschia sinuata var. tabellaria

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Loren Bahls - January 2014
Length Range: 23-44 µm
Width Range: 6.2-8.5 µm
Striae in 10 µm: 18-21

Description

Valves are linear-lanceolate, with triundulate margins and capitate apices. Fibulae are very large, occupy about one-half the valve face, and number 3-7 in 10 µm. Striae are distinctly punctate and weakly radiate. The raphe appears to be continuous through the central valve, as the central fibulae lack a distinctive gap. (Note that some authors express this feature by stating that the “central nodule is absent”).



Original Description

Basionym: Denticula sinuata
Author: Thwaites in W. Smith 1856
Length Range: µm
Striae in 10 µm:

Original Description

Original Images


Cite This Page:
Bahls, L. (2014). Nitzschia sinuata. In Diatoms of the United States. Retrieved December 02, 2016, from http://westerndiatoms.colorado.edu/taxa/species/nitzschia_sinuata_var._sinuata

Species: Nitzschia sinuata

Contributor: Loren Bahls

Reviewer: Sarah Spaulding

Citations

Cleve, P.T. and Grunow, A. (1880). Beiträge zur Kenntniss der Arktischen Diatomeen. Kongliga Svenska-Vetenskaps Akademiens Handlingar, 17(2): 121 pp., 7 pls.

Krammer, K. and Lange-Bertalot, H. (1988). Bacillariophyceae. 2. Teil: Bacillariaceae, Epithemiaceae, Surirellaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/2. Gustav Fisher Verlag, Jena.

Smith, W. (1856). Synopsis of British Diatomaceae. John Van Voorst, London 1856. 2: 107pp., pls. 32-60, 61-62, A-E.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA

California Academy of Sciences (CAS)

Nitzschia sinuata CAS

North American Diatom Ecological Database (NADED)

NADED ID: 48096

Autecology Discussion

Nitzschia sinuata var. sinuata is uncommon in the benthos of shallow calcareous lakes and ponds of the northern Rocky Mountains. Here it is found at pH values ranging from 8.50 to 9.05 and specific conductance levels ranging from 105 to 181 µS/cm.

Images

Lower Wolverine Pond, Ten Lakes Scenic Area, Kootenai National Forest, Lincoln County, Montana: home of Nitzschia sinuata var. sinuata.

Credit/Source: Loren Bahls

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

Nitzschia sinuata


EMAP Response Plots

Nitzschia sinuata


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.