Fragilaria mesolepta

Rabenhorst 1861      Category: Araphid
SYNONYM(S): Fragilaria capucina var. mesolepta (Rabenhorst) Rabenhorst 1864 | Fragilaria virescens f. mesolepta (Rabenhorst; Schonfeldt) Cleve-Euler 1953 | Staurosira capucina var. mesolepta (Rabenhorst) Comère 1892 

Fragilaria crotonensis

 

Fragilaria pennsylvanica

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Behnaz Balmaki - August 2015
Length Range: 13-44 µm
Width Range: 2-3.5 µm
Striae in 10 µm: 13-17

Description

Valves are linear-lanceolate and slightly panduriform. The valves are constricted at mid-valve and expanded toward the apices. Apices are rostrate to subcapitate. Striae are parallel and indistinct. The striae from opposite margins may be aligned, or may be slightly off set from one another. Some specimens possess faint striae in the central area. The axial area is narrow. Frustules are linked to form colonies.

The morphology presented here conforms to the type illustrations (Tuji and Williams 2008).



Original Description

Basionym:
Author: Rabenhorst 1861
Length Range: µm
Striae in 10 µm:

Original Description

Original Images


Cite This Page:
Balmaki, B. (2015). Fragilaria mesolepta. In Diatoms of the United States. Retrieved December 17, 2017, from http://westerndiatoms.colorado.edu/taxa/species/fragilaria_mesolepta

Species: Fragilaria mesolepta

Contributor: Behnaz Balmaki

Reviewer: Dennis Vander Meer

Citations

Rabenhorst, L.G. (1861). Die Algen Europa’s Forsetzung der algen Sachsens, resp. Mittel-Europa’s. Decades 3-4, numbers 1021-1040. Dresden.

Tuji, A. and Williams, D.M. (2008). Examination of type material of Fragilaria mesolepta Rabenhorst and two similar, but distinct, taxa. Diatom Research, 23(2): 503-510. 10.1080/0269249X.2008.9705772

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Fragilaria mesolepta CAS

NCBI Genbank Taxonomy

Fragilaria capucina var. mesolepta NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 34237

Autecology Discussion

Fragilaria mesolepta was found in the plankton of West Lake Okoboji and Beck’s Canal in Dickinson County, Iowa, in an algal squeezing from Union Slough, Kossuth County, Iowa, and in epilithic samples from the Missouri River (Yankton, South Dakota).

Images

Distribution of Fragilaria mesolepta in rivers of the continental U.S. based on the National Water Quality Assessment program. Retrieved 03 June 2015.

Credit/Source: USGS BioData

Distribution of Fragilaria mesolepta in rivers of Alaska based on the National Water Quality Assessment program. Retrieved 03 June 2015.

Credit/Source: USGS BioData

Distribution of Fragilaria mesolepta in rivers of Hawaii based on the National Water Quality Assessment program. Retrieved 03 June 2015.

Credit/Source: USGS BioData

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

Fragilaria mesolepta


EMAP Response Plots

Fragilaria mesolepta


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.