Karayevia laterostrata
(Hustedt) Bukhtiyarova 1999 Category: Monoraphid
BASIONYM: Achnanthes laterostrata Hustedt 1933
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Marina Potapova - November 2010
Length Range: 9-16 µm
Width Range: 6-8 µm
Striae in 10 µm: 14-18
Description
Valves are elliptical with narrowly capitate to subcapitate apices. The raphe valve has a lanceolate axial area and no distinct central area. The raphe is straight, without terminal fissures. The proximal raphe ends are simple externally. The proximal raphe ends curve toward opposite sides internally. Striae on raphe valve are radiate, in the valve center short and long striae alternate, 14-18 in 10 µm. Each stria represents a single transapically elongated areola. The rapheless valve has a linear axial area and no central area. Striae on rapheless valve are punctate, parallel in the center and slightly radiate at apices, 14-18 in 10 µm. The openings of the areolae are transapically elliptical.
Original Description
Basionym: Achnanthes laterostrata
Author: Hustedt 1933
Length Range: 12-16 µm
Width Range: 6-8 µm
Striae in 10 µm: 16 in 10 μm in RL valve, 18 in 10 μm in R valve
Original Description
Schalen mit breit elliptischem Mittelteil, vor den Polen ziemlich plötzlich und stark verschmälert, mitauffällig breit vorgezogenen, an den Polen f1ach gestutzten Enden, 12—16 μ lang, 6—8 μ breit. Raphenlose Schalen mit sehr schmal lanzettlicher Pseudoraphe, ohne Zentralarea; Transapikalstreifen etwa 16 in 10 μ, leicht radial, deutlich punktiert, Punkte etwa 28 in 10 μ. Raphen-schale mit fadenförmiger Raphe, Axialarea eng, gegen die Mitte kaum erweitert, ohne Zentralarea; Transapikalstreifen nur wenig zarter, etwa 18 in 10 μ, ebenfalls radial, am Rande oft kurze Streifen eingeschoben, Punktierung zarter als auf der anderen Schale
Original Images
Cite This Page:
Potapova, M. (2010). Karayevia laterostrata. In Diatoms of the United States. Retrieved June 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/karayevia_laterostrata
Species: Karayevia laterostrata
Contributor: Marina Potapova
Reviewer: Rex Lowe
Image Credit: Marina Potapova
- Valves elliptical with capitate to subcapitate apices
- Striae on rapheless valve punctate
- Striae on raphe valve radiate
- Long and short striae alternate in middle part of raphe valve
Valves are elliptical with narrowly capitate to subcapitate apices. The raphe valve has a lanceolate axial area and no distinct central area. Striae on raphe valve are radiate, in the valve center short and long striae alternate, 14-18 in 10 µm. The rapheless valve has a linear axial area and no central area. Striae on rapheless valve are punctate, parallel in the center and slightly radiate at apices, 14-18 in 10 µm.
Compare
Karayevia laterostrata differs from K. clevei in having elliptical valves with narrowly capitate to subcapitate apices. Valves of K. clevei are lanceolate with rounded to subrostrate apices.
Karayevia clevei
Citations
Bukhtiyarova, L. (1999). Diatoms of Ukraine inland waters. National Academy of Sciences of Ukraine, M.G. Kholodny Institute of Botany, Kyiv, Ukraine. 133 pp.
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.
Round, F. E. and Bukhtiyarova, L. (1996). Four new genera based on Achnanthes (Achnanthidium) together with a re-definition of Achnanthidium. Diatom Research 11: 345-361.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 125002
Autecology Discussion
EMAP Assessment
Sampling for 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). Streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming). Over 1200 sites on 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 laterostrata
Distribution
The distribution map represents the relative abundance of this Karayevia laterostrata in the western EMAP study. Relative abundance is a measure of the proportion of cells of this species based on a "fixed count" of 300 total diatom cells counted and identified. Each of the western EMAP sample sites is shown, either with a black dot for sites where Karayevia laterostrata was not recorded, or with a red circle indicating the relative abundance of Karayevia laterostrata.
Note that the size of the proportional symbols varies between species to help show both abundant and rare species.
Scale for the map to the left
EMAP Response Plots
Karayevia laterostrata
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.