Hustedt in A. Schmidt et al. 1934 Category: Symmetrical biraphid
BASIONYM: Navicula duerrenbergiana Hustedt in Schmidt et al. 1934
REPORTED AS: Navicula stundlii (Hustedt 1959)
Contributor: Loren Bahls - January 2012
Length Range: 40-52 µm
Width Range: 3.8-5.4 µm
Striae in 10 µm: 15-17
Valves are weakly silicified and narrow linear-lanceolate with acutely pointed apices. The axial area is very narrow and barely wider than the raphe. The central area is absent. Raphe branches are filiform. Proximal raphe ends are straight, not expanded, and very close together. Striae are finely lineate and weakly radiate throughout. Areolae in the striae number about 45 in 10 µm.
Note: the name Navicula duerrenbergiana is considered to be invalid (California Academy of Sciences, Catalogue of Diatom Names, September 2011).
Basionym: Navicula duerrenbergiana
Author: Hustedt in Schmidt et al. 1934
Length Range: µm
Striae in 10 µm:
Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.
Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.
Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.
Simonsen, R. (1987). Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. J. Cramer, Berlin & Stuttgart 1: 525 pp.
NADED ID: 93021
There are 101 records of Navicula duerrenbergiana in the Montana Diatom Collection, all of them from streams on the Northwestern Great Plains of Montana, South Dakota, and Wyoming. These waters have a mean pH of 8.2 and a mean conductivity of 1899 µS/cm, along with elevated concentrations of sodium and sulfate (see table below). Common diatom associates of Navicula duerrenbergiana in these habitats include Mastogloia smithii, Nitzschia reversa, Gyrosigma macrum, Mastogloia elliptica, Nitzschia microcephala, Tryblionella compressa, Nitzschia filiformis, Navicula salinicola, Diploneis puella, and Biremis circumtexta. In Europe, Krammer and Lange-Bertalot (1986) report Navicula duerrenbergiana from brackish waters along sea coasts and from inland waters with elevated electrolyte content.
Little Dry Creek at Flowing Well, Garfield County, Montana: home of Navicula duerrenbergiana.
Credit/Source: Loren Bahls
Abundance-weighted means of selected water quality variables measured concurrently with the collection of samples containing Navicula duerrenbergiana.
Credit/Source: Montana Diatom Database
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.
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.