Navicula lanceolata

(C.Agardh) Ehrenb. 1838      Category: Symmetrical biraphid
BASIONYM: Frustulia lanceolata C.Agardh 1827

Navicula kotschyi


Navicula leptostriata

LM scalebar = 10 µm = 40 pixels.


Contributor: Marina Potapova - May 2009
Length Range: 30-60 µm
Width Range: 9–12 µm
Striae in 10 µm: 10–13


Valves are lanceolate, with rounded ends, 9-12 µm wide, 30-60 µm long. The raphe is filiform, with the central portions of the branches and central raphe endings slightly deflected towards the primary side of the valve. Terminal raphe fissures are hooked towards the secondary side. The axial area is narrow, linear. The central area is rounded rectangular or square. Striae are radiate, but convergent at the valve apices, 10-13 in 10 µm. Areolae ~32 in 10 µm.

Original Description

Basionym: Frustulia lanceolata
Author: C.Agardh 1827
Length Range: µm
Striae in 10 µm:

Original Description

Frustulia lanceolata, strato luteo-fusco submucoso e frustulis lanceolatis angustis obtusiusculis uniformiter coloratis constituto. In ostio thermarum ad Carlsbad, demersa ubi aqua adhuc calida (25 R.)

Original Images

Cite This Page:
Potapova, M. (2009). Navicula lanceolata. In Diatoms of the United States. Retrieved April 20, 2018, from

Species: Navicula lanceolata

Contributor: Marina Potapova

Reviewer: Sam Rushforth


Agardh, C.A. (1827). Aufzählung einiger in den ostereichischen Ländern gefundenen neuen Gattungen und Arten von Algen nebst ihrer Diagnostik und beigefugten Bemerkungen. Flora oder Botanische Zeitung, Regensburg 2:625-640.

Ehrenberg, C.G. (1838). Die Infusionsthierchen als vollkommene Organismen. Ein Blick in das tiefere organische Leben de Natur. erlag von Leopold Voss, Leipzig. pp. 1-xvii, 1-548, pls. 1-64.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula lanceolata CAS

NCBI Genbank Taxonomy

Navicula lanceolata NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 46859

Autecology Discussion

Fresh and brackish water. Eutraphentic, cold-water 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 lanceolata

EMAP Response Plots

Navicula lanceolata

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.