• Category
  • Length Range
    34-100 µm
  • Width Range
    4.5-6.0 µm
  • Striae in 10 µm
  • Synonyms
    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



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 1966, p. 141) gives a detailed review of the nomenclature of this species.


This taxon is characteristic of waters of high specific conductance and/or high salinity.

Original Description

  • Basionym
    Diatoma fasciculata
  • Author
    C.Agardh 1812

Cite This Page

Kociolek, P. (2011). Tabularia fasciculata. In Diatoms of North America. Retrieved June 13, 2024, from https://diatoms.org/species/tabularia_fasciculata


The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Tabularia fasciculata from all the stream reaches where it was present. Note that the relative abundance scale is the same on each plot. Explanation of each environmental variable and units are as follows:

ELEVATION = stream reach elevation (meters)
STRAHLER = distribution plot of the Strahler Stream Order
SLOPE = stream reach gradient (degrees)
W1_HALL = an index that is a measure of streamside (riparian) human activity that ranges from 0 - 10, with a value of 0 indicating of minimal disturbance to a value of 10 indicating severe disturbance.
PHSTVL = pH measured in a sealed syringe sample (pH units)
log_COND = log concentration of specific conductivity (µS/cm)
log_PTL = log concentration of total phosphorus (µg/L)
log_NO3 = log concentration of nitrate (µeq/L)
log_DOC = log concentration of dissolved organic carbon (mg/L)
log_SIO2 = log concentration of silicon (mg/L)
log_NA = log concentration of sodium (µeq/L)
log_HCO3 = log concentration of the bicarbonate ion (µeq/L)
EMBED = percent of the stream substrate that is embedded by sand and fine sediment
log_TURBIDITY = log of turbidity, a measure of cloudiness of water, in nephelometric turbidity units (NTU).
DISTOT = an index of total human disturbance in the watershed that ranges from 1 - 100, with a value of 0 indicating of minimal disturbance to a value of 100 indicating severe disturbance.