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Navicula trivialis

Lange-Bert. 1980      Category: Symmetrical biraphid

Navicula tripunctata


Navicula vaneei

LM scalebar = 10 µm = 80 pixels.


Contributor: Sam Rushforth | Sarah Spaulding - November 2010
Length Range: 28-44 µm
Width Range: 8-10 µm
Striae in 10 µm: 12


Valves are lanceolate with slightly rostrate, rounded ends, 8-10 µm wide by 28-44 µm long. The raphe is filiform. The central portions of the raphe branches and proximal raphe ends are deflected toward the primary side. Terminal raphe fissures are hooked towards the secondary side. The axial area is narrow and linear. The central area is oval to slightly asymmetrical. Striae are strongly radiate, becoming slightly convergent at the valve apices. Striae are lineolate, 12 in 10 µm. Areolae are 30-32 in 10 µm.

Original Description

Author: Lange-Bert. 1980
Length Range: 25-65 µm
Width Range: 8-12.5 µm
Striae in 10 µm: 10-11 (median), 13-15 (polar)

Original Description

Frustula e facie connectivali linearis , ad utrumque finem parum attenuata, apicibus truncatus.Valvae lanceolatae, 25-65 um longae, 8-12.5 latae, apicibus plus minus sed leniter attenuato-rostratis; striis transversis circa nodulum medianum abbreviatis et aream hyalinam fere rotundatam circum eumlinquentibus, usque fere ad apices valvae radiantibus, subtiliter lineolatis (circiter 35 linolae in 10 um) in valvae medio 10-11, ad apices13-15 in 10 um. Rami raphe directi poris centralibus distinctibus fissurisque terminalibus brevibus unilateraliter curvatis. Holotypus: Sub no. 708 (=Herbarium Kützing 874) in collectione Grunow in Vindisbona (Wein). Isotypus sub no. BM 18712 in collectione Kützing in London (British Museum). Habitat: In aqua dulci prope urbem Carlsruhe, Germania, ceterum passim in aquis dulcibus et subsalsis diversis in Europa et America frequentissime adest.

Original Images

Cite This Page:
Rushforth, S., and Spaulding, S. (2010). Navicula trivialis. In Diatoms of the United States. Retrieved May 23, 2018, from

Species: Navicula trivialis

Contributor: Sam Rushforth | Sarah Spaulding

Reviewer: Pat Kociolek


Cox, E.J. (1995). Taxonomic studies on the diatom genus Navicula Bory VII. The identity and typification of Navicula gregaria Donkin, N. cryptocephala Kutz. and related taxa. Diatom Research 10: 91-111. 10.1080/0269249X.1995.9705330

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.

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

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula trivialis CAS

NCBI Genbank Taxonomy

Navicula trivialis NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 46014

Autecology Discussion

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 trivialis

EMAP Response Plots

Navicula trivialis

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.