Navicula slesvicensis

Grunow in Van Heurck 1880      Category: Symmetrical biraphid
SYNONYM(S): Navicula viridula var. slesvicensis (Grunow in Van Heurck) Grunow in Cleve and J.D.Möller 

Navicula seibigiana


Navicula sovereignii

LM scalebar = 10 µm = 40 pixels.


Contributor: Marina Potapova | Loren Bahls - October 2011
Length Range: 36-69 µm
Width Range: 10-12.5 µm
Striae in 10 µm: 8-9


Valves are linear-elliptic to linear-lanceolate with apices that are wedge-shaped in smaller specimens and more produced, subrostrate in larger specimens. The axial area is narrow and straight. The central area is transversely elliptic or irregularly rhomboid. The raphe is straight, moderately lateral, with dilated external proximal raphe ends. The central nodule is symmetric. Striae are radiate in the valve center, more widely spaced about the central area and convergent at the apices. The areolae are visible under LM and number approximately 25 in 10 μm.

Original Description

Author: Grunow in Van Heurck 1880
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Potapova, M., and Bahls, L. (2011). Navicula slesvicensis . In Diatoms of the United States. Retrieved April 18, 2018, from

Species: Navicula slesvicensis

Contributor: Marina Potapova | Loren Bahls

Reviewer: Rex Lowe


Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.

Van Heurck, H. (1880). Synopsis des Diatomées de Belgique. Atlas. Ducaju & Cie., Anvers.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula slesvicensis CAS

NCBI Genbank Taxonomy

Navicula slesvicensis NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 46732

Autecology Discussion

Navicula slesvicensis has been reported from creeks and rivers in Montana, North Dakota and Wyoming, where it prefers warm, muddy waters rich in sodium sulfate and organic nitrogen. Common diatom associates of N. slesvicensis in these streams include Navicula peregrina, Entomoneis paludosa, Navicula salinarum, Ctenophora pulchella, Entomoneis alata, Biremis circumtexta, Craticula halophila, Tabularia fasciculata, Pleurosigma delicatulum, Fragilaria famelica, Navicula goersii, and Fallacia tenera. In Europe, Navicula slesvicensis is found in electrolyte-rich freshwaters and in coastal waters, estuaries, and inland salt springs (Lange-Bertalot 2001).

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

Navicula slesvicensis

EMAP Response Plots

Navicula slesvicensis

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.