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Karayevia suchlandtii

(Hust.) Bukht.      Category: Monoraphid
BASIONYM: Achnanthes suchlandtii Hust. 1933

Karayevia ploenensis var. gessneri


Kobayasiella jaagii

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - May 2010
Length Range: 7-15 µm
Width Range: 3.6-5.3 µm
Striae in 10 µm: 18-20


Valves are elliptical to linear-elliptical. The raphe valve has a lanceolate axial area and no distinct central area. The raphe is straight without terminal fissures. External proximal and distal raphe endings are slightly expanded. Striae in the middle of raphe valve are almost parallel, becoming radiate toward apices, 18-20 in 10 µm. The rapheless valve has a linear axial area and no central area. Striae on rapheless valve are interrupted by a longitudinal line at each side of the valve, they are slightly radiate or almost parallel in the valve center, becoming radiate toward apices, 18-20 in 10 µm. The vimines dividing areolae within striae on both raphe and rapheles valves are often incomplete, so that areolae are often partially fused. They are arranged in either uniseriate or biseriate striae, which are formed by offset double rows of areolae. The double rows are more often observed towards the valve margins.

Original Description

Basionym: Achnanthes suchlandtii
Author: Hust. 1933
Length Range: 8-11 µm
Width Range: 3.5-4.5 µm
Striae in 10 µm: 22 in the center of the raphe valve

Original Description

Schalen elliptisch mit breit gerundeten Enden, 8-11 µ lang, 3,5-4,5 breit. Raphenlose Schalen mit leicht radialen Transpicalstreifen, etwa 22 in 10 µ, beiderseits der Mittellinie durch eine schmale, hyaline Furche (Längsrippe) unterbrochen; Pseudoraphe sehr eng, linear. Raphenschen mit gerader, faden förmiger Raphe; Axialarea sehr eng, um den Mittelknoten nicht merklich erweitert; Transapikalstreifen ebenfalls leicht radial, 22 in 10 µ, ohne Längsfurche (Fig. 859B).

Original Images

Cite This Page:
Potapova, M. (2010). Karayevia suchlandtii. In Diatoms of the United States. Retrieved May 25, 2018, from

Species: Karayevia suchlandtii

Contributor: Marina Potapova

Reviewer: Rex Lowe


Hustedt, F. (1933). Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. In: L. Rabenhorst (ed.), Kryptogamen Flora von Deutschland, Österreich und der Schweiz. Akademische Verlagsgesellschaft m.b.h. Leipzig, Vol. 7, Part 2, pp. 321-432.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Karayevia suchlandtii CAS

North American Diatom Ecological Database (NADED)

NADED ID: 125009

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

Karayevia suchlandtii

EMAP Response Plots

Karayevia suchlandtii

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.