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Navicula tripunctata

(O.F.Müll.) Bory 1822      Category: Symmetrical biraphid
BASIONYM: Vibrio tripunctatus O.F.Müll. 1786

Navicula trilatera


Navicula trivialis

LM scalebar = 10 µm = 40 pixels.


Contributor: Marina Potapova - May 2009
Length Range: 32-60 µm
Width Range: 6–10 µm
Striae in 10 µm: 9–12


Valves are linear-lanceolate with wedge-shaped ends, 6-10 µm wide, 32-60 µm long. The raphe is straight. The axial area is narrow, linear, with the central area transversely rectangular or elliptical. The striae are almost parallel throughout the valve, weakly radiate in the middle and slightly convergent at the apices, 9-12 in 10 µm. Areolae 30-33 in 10 µm.

Original Description

Basionym: Vibrio tripunctatus
Author: O.F.Müll. 1786
Length Range: µm
Striae in 10 µm:

Original Description

Vibrio linearis, utrique attenuatus, globulis tribus, extremis minoribus.

Original Images

Cite This Page:
Potapova, M. (2009). Navicula tripunctata. In Diatoms of the United States. Retrieved May 23, 2018, from

Species: Navicula tripunctata

Contributor: Marina Potapova

Reviewer: Sam Rushforth


Bory de Saint-Vincent, J.B.M. (1822). Dictionnaire Classique d’Histoire Naturelle. Paris. Rey & Gravier, libraires-éditeurs; Baudouin Frères, libraires-éditeurs. vol. 1.

Müller, O.F. (1786). Diatomaceen (Vibrio paxillifer, V. bipunctatus, V. tripunctatus, Gonium pulvinatum). Animalcula infusoria fluviatilia et marina quae detexit, systematice, descripsit et ad vivum delineare curavit O.F. Muller. Havniae, 1786., LVI + 367 pp., 50 pls.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula tripunctata CAS

NCBI Genbank Taxonomy

Navicula tripunctata NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 46104

Autecology Discussion

Eutraphentic species

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 tripunctata

EMAP Response Plots

Navicula tripunctata

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.