(Ehrenberg) Kützing 1844 Category: Symmetrical biraphid
BASIONYM: Pinnularia peregrina Ehrenberg 1843
Contributor: Loren Bahls - November 2011
Length Range: 66-115 µm
Width Range: 15.9-20.0 µm
Striae in 10 µm: 6-7
Valves are lanceolate with obtusely rounded ends. The axial area is narrow and widens gradually into a more or less circular central area. The central area is about one-half as wide as the valve. The raphe is weakly lateral, with expanded proximal ends that are slightly deflected to the primary side. Striae are radiate, becoming convergent near the ends and more widely spaced at the center. Areolae are coarse and number 19-21 in 10 µm.
Basionym: Pinnularia peregrina
Author: Ehrenberg 1843
Length Range: µm
Striae in 10 µm:
P. peregrina, testula anguste lineari- lanceolata, apicibus sensim acutis non constrictis, pinnulis obliquis. Icon!
Ehrenberg, C.G. (1843). Verbreitung und Einfluß des mikroskopischen Lebens in Süd- und Nord-Amerika. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin, 1841: 291-445, 4 Tafel.
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.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Navicula peregrina is common in rivers and creeks on the northern Great Plains, where it prefers alkaline and somewhat brackish waters with elevated concentrations of sodium and sulfate. Here it is most often found with Navicymbula pusilla, Navicula salinarum, Ctenophora pulchella, Tabularia fasciculata, Pleurosigma delicatulum, Nitzschia microcephala, Entomoneis paludosa, Biremis circumtexta, Tryblionella hungarica, Mastogloia elliptica, and Fragilaria famelica. Patrick & Reimer (1966) report Navicula peregrina from coastal states (Atlantic, Gulf, Pacific) as well as plains states. Lange-Bertalot (2001) reports this taxon as common in Europe along sea coasts and in brackish inland waters.
Abundance-weighted mean values for selected water quality variables measured concurrently with the collection of samples containing Navicula peregrina.
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.