Nitzschia angustata

W. Smith 1853      Category: Nitzschioid
BASIONYM: Tryblionella angustata W. Smith 1853

Nitzschia amphibia

 

Nitzschia balcanica

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Ian Bishop | Sarah Spaulding - February 2015
Length Range: 30-88 µm
Width Range: 6-7.5 µm
Striae in 10 µm: 15-17

Description

Valves are linear-lanceolate, with the central margins nearly parallel. Apices are rounded and subrostrate. The striae are distinctly punctate, with coarse areolae (24-27 in 10 µm). The fibulae are in line with the striae, and may be difficult to discern. A central, longitudinal fold is absent.

Under the SEM, N. angustata has a longitudinal marginal rib on the opposite site of the raphe. Small areolae are present on either side of the raphe. These two features are not typical of either Nitzschia or Tryblionella and, therefore, the systematic position of this taxon is uncertain.



Original Description

Basionym: Tryblionella angustata
Author: W. Smith 1853
Length Range: 8-16 µm
Striae in 10 µm: 14

Original Description

Original Images


Cite This Page:
Bishop, I., and Spaulding, S. (2015). Nitzschia angustata. In Diatoms of the United States. Retrieved June 26, 2017, from http://westerndiatoms.colorado.edu/taxa/species/nitzschia_angustata_1

Species: Nitzschia angustata

Contributor: Ian Bishop | Sarah Spaulding

Reviewer: Sonja Hausmann

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.

Grunow, A. (1880). Bemerkungen zu den Diatomeen von Finnmark, dem Karischen Meere und vom Jenissey nebst Vorarbeiten für Monographie der Gattungen Nitzschia, Achnanthes, Pleurosigma, Amphiprora, Plagiotropis, Hyalodiscus, Podosira und einiger Navicula-Gruppen. Kongliga Svenska Vetenskaps-Akademiens Handligar, ser. 4, 17(2): 16-121; pls. I-VII.

Hofmann, G., Lange-Bertalot, H., and Werum, M. (2013). Diatomeen im Süßwasser-Benthos von Mitteleuropa: 2 Corrected Edition. Koeltz Scientific Books, Königstein, 908 pp.

Hustedt, F. (1930). Bacillariophyta (Diatomeae). In: Die Subwasser Flora Mitteleuropas. (A. Pascher, ed.),10, Gustav Fischer, Jena. 468 pp.

Smith, W. (1853). Synopsis of British Diatomaceae. John Van Voorst, London 1853. 89 pp., pls 1-31.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Nitzschia angustata CAS

North American Diatom Ecological Database (NADED)

NADED ID: 48093

Autecology Discussion

Images

Distribution of Nitzschia angustata in continental U.S. rivers in the National Water Quality Assessment program. Retrieved 11 February 2015.

Credit/Source: USGS BioData

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 angustata


EMAP Response Plots

Nitzschia angustata


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.