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Surirella minuta

Bréb. ex Kütz. 1849      Category: Surirelloid
SYNONYM(S): Surirella ovalis var. minuta (Bréb.) Van Heurck | Surirella ovata var. minuta (Bréb.) A.Cleve. | Surirella pinnata var. minuta (Bréb.) Schum. 
REPORTED AS: Surirella pinnata (W. Smith 1853) | Surirella ovata (Kützing 1844 pro parte) 

Surirella iowensis


Surirella ovalis

LM scalebar = 10 µm = 40 pixels.


Contributor: Jonathan English - February 2011
Length Range: 18-71 µm
Width Range: 8.5-14 µm
Striae in 10 µm: 25-32


Valves 18-71 µm long by 8.5-14 µm wide, with a length to width ratio between 2 and 5. The keel is low and alar canals are not visible. Valves are heteropolar, with the headpole slightly broader and rounder than the footpole. Apices are broadly rounded and the valve sides are straight,tapering slightly toward the footpole. Fibulae 9-12 in 10 μm, extending from the mantle to the apical axial line. Costae are fine, 25-32 in 10 µm, extending from the valve margin to the apical axis. Every third or fourth costae is raised, 6-9 in 10 µm. 3-5 rows of areolae exist between the costa, which are only visible in the SEM. A single row of what appear to be large areolae in the LM occurs around the circumference of the valve, between the keel and the valve face. These structures are actually indentations in the valve face.

Original Description

Author: Bréb. ex Kütz. 1849
Length Range: 21.2-45 µm
Striae in 10 µm: 3-4

Original Description

S. minuta. Breb. in litt. - S. a latere primario late cuneata, truncata, secundario ovata, striis marginalibus delicatulis in 1/100”’ parte 7-9. - Long. 1/100-1/47”’. - Frustulia subquadrata Breb. Alg. Falaise p. 45. Pl. VI. - Surirella ovata Kg. bacill. {. 62. Tab. 7. Fig. I. II. III. IV. - In Germania, Gallia

Original Images

Cite This Page:
English, J. (2011). Surirella minuta. In Diatoms of the United States. Retrieved May 22, 2018, from

Species: Surirella minuta

Contributor: Jonathan English

Reviewer: Sam Rushforth


Brébisson, A. de. (1838). Considérations sur les Diatomées et essai d’une classification des genres et des espèces appartenant à cette famille. Brée l'Ainé Imprimeur-Libraire, Falaise. 22 pp.

Krammer, K. and Lange-Bertalot, H. (1987). Morphology and taxonomy of Surirella ovalis and related taxa. Diatom Research 2: 77-95. 10.1080/0269249X.1987.9704986

Krammer, K. and Lange-Bertalot, H. (1988). Bacillariophyceae. 2. Teil: Bacillariaceae, Epithemiaceae, Surirellaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/2. Gustav Fisher Verlag, Jena.

Kützing, F.T. (1849). Species Algarum. Lipsiae. F.A. Brockhaus, 922 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

NCBI Genbank Taxonomy

Surirella minuta NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 65048

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

Surirella minuta

EMAP Response Plots

Surirella minuta

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.