Tabularia fasciculata

(C.Agardh) D.M.Williams and Round 1986      Category: Araphid
BASIONYM: Diatoma fasciculata C.Agardh 1812
SYNONYM(S): Fragilaria fasciculata (C.Agardh) Lange-Bert. 1980 | Echinella fasciculata (C.Agardh) Jürg. 1816-1822 | Ctenophora pulchella var. fasciculata (C.Agardh ex specim., Kütz.) Schönf. 1907 

Tabellaria flocculosa


Terpsinoë musica

LM scalebar = 10 µm = 40 pixels.


Contributor: Pat Kociolek - March 2011
Length Range: 34-100 µm
Width Range: 4.5-6.0 µm
Striae in 10 µm: 12-15


Valves are linear-lanceolate to lanceolate, with some specimens slightly or even distinctly asymmetric to the transapical axis, although this is not characteristic of the species. The apices are set off slightly and rounded but not capitate. The axial area is very broad and the width can be variable within populations. No central area is evident. The length:breadth ratio is also variable, even in this more restricted sense of the species (as compared to the interpretation of Krammer and Lange-Bertalot 1991). Striae are costate, areolae are not visible in the LM. Both apices appear to have small pore fields.

Patrick (in Patrick and Reimer 1996, p. 141) gives a detailed review of the nomenclature of this species.

Original Description

Basionym: Diatoma fasciculata
Author: C.Agardh 1812
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Kociolek, P. (2011). Tabularia fasciculata. In Diatoms of the United States. Retrieved April 22, 2018, from

Species: Tabularia fasciculata

Contributor: Pat Kociolek

Reviewer: Rex Lowe


Krammer, K. and Lange-Bertalot, H. (1991). Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae. In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.

Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.

Williams, D.M. and Round, F.E. (1987). Revision of the genus Synedra Ehrenb. Diatom Research 1(2): 313-339.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Tabularia fasciculata CAS

NCBI Genbank Taxonomy

Tabularia fasciculata NCBI

North American Diatom Ecological Database (NADED)

NADED ID: 200002

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

Tabularia fasciculata

EMAP Response Plots

Tabularia fasciculata

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.