• Category
  • Length Range
    9-21 µm
  • Width Range
    4.5-8.0 µm
  • Striae in 10 µm



Valves are rhombic to lanceolate, swollen at the center, with apices nearly capitate to rounded. The fibulae of the raphe are distinct, elongate (crossing about ½ of the valve face), numbering 6-8 in 10 µm. Striae are distinctly punctate and radiate. A central nodule is absent.


Original Description

  • Basionym
    Denticula tabellaria
  • Author
    Grunow 1862

EMAP Assessment

EMAP Distribution

Nitzschia Sinuata Var  Tabellaria   Grunow   Grunow 3
Map 3

Response Plots

Nitzschia Sinuata Var  Tabellaria   Grunow   Grunow

Cite This Page

Kociolek, P. (2011). Nitzschia sinuata var. tabellaria . In Diatoms of North America. Retrieved November 12, 2019, from https://diatoms.org/species/nitzschia_sinuata_var._tabellaria


The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Nitzschia sinuata var. tabellaria 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.