• Category
  • Length Range
    6-14 µm
  • Width Range
    2-3 µm
  • Striae in 10 µm



Valves linear-lanceolate to somewhat elliptical, apices obtuse-rostrate. Keel is strongly excentric. Fibulae are small, about 10-11 in 10 µm. Striae are parallel, fine.

Known only from Oregon. Probably indicative of clean water.


Original Description

  • Author
    Sovereign 1958

Original Images

Sovereign 1958  Plate  Iv Innominata
Sovereign 1958 P 130 Innominata

Cite This Page

Kociolek, P. (2011). Nitzschia innominata. In Diatoms of North America. Retrieved May 20, 2024, from https://diatoms.org/species/nitzschia_innominata


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