Navicula recens

Lange-Bertalot in Krammer and Lange-Bertalot 1985      Category: Symmetrical biraphid
BASIONYM: Navicula cari var. recens Lange-Bertalot 1980

Navicula radiosa

 

Navicula reichardtiana

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Marina Potapova - May 2009
Length Range: 17-42 µm
Width Range: 5.8-8.2 µm
Striae in 10 µm: 11–13

Description

Valves are lanceolate with wedge-shaped ends. The raphe is straight and filiform. The axial area is narrow and linear. The central area is round or transversely rectangular. Striae are radiate, becoming convergent at the valve apices. Striae number 11-13 in 10 µm. Areolae number approximately 30-33 in 10 µm. Striae are bent in the middle of the valve and short striae often alternate with longer ones around the central area.



Original Description

Basionym: Navicula cari var. recens
Author: Lange-Bertalot 1980
Length Range: 20-40 µm
Width Range: 7–9 µm
Striae in 10 µm:

Original Description

A typo differt valvis modice magis elliptico-lanceolatis contra lineari-lanceolatas, 20-40 µm longis, 7-9 µm latis. Area centralis paulo minus lateraliter elongata, poris centralibus se ipsis magis appropinquatis.

Original Images

Original text and images reproduced with permission by Elsevier.


Cite This Page:
Potapova, M. (2009). Navicula recens. In Diatoms of the United States. Retrieved October 31, 2014, from http://westerndiatoms.colorado.edu/taxa/species/Navicula_recens

Species: Navicula recens

Contributor: Marina Potapova

Reviewer: Sam Rushforth

Citations

Krammer, K. and Lange-Bertalot, H. (1985). Naviculaceae Neue und wenig bekannte Taxa, neue Kombinationen und Synonyme sowie Bemerkungen zu einigen Gattungen. Bibliotheca Diatomologica 9:5-230, 43 pls.

Lange-Bertalot, H. (1980). Zur taxonomischen Revision einiger ökologisch wichtiger “Navicula lineolatae” Cleve. Die Formenkreise um Naviculae lanceolata, N. viridula, N. cari. Cryptogamie, Algologie 1(1):29-50.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Navicula recens CAS

North American Diatom Ecological Database (NADED)

NADED ID: 46649

Autecology Discussion

This taxon prefers brackish water or fresh water of high mineral content, eutraphentic.

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 recens


EMAP Response Plots

Navicula recens


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.