• Category
  • Length Range
    23-35 µm
  • Width Range
    8-9 µm
  • Striae in 10 µm
  • Synonyms
    Schizonema salinarum (Grunow) Kuntze 1898



Valves are broadly elliptical-lanceolate with produced, rostrate ends. The axial area is straight and relatively narrow, enlarging to form an elliptical to elliptical-lanceolate central area. The central area is formed by alternating long and short striae in the center of the valve. Striae are lineate, radiate, and arched, becoming parallel near the apices.

While the valve lengths we have seen are similar to those of Patrick and Reimer, we have not seen specimens as wide (they report widths up to 12 µm).


This taxon is not widespread in US rivers, but it is indicative of high conductance waters. It is considered to be tolerant of salts, fine sediments, and watershed disturbance.

Original Description

Schalen breit lanzettlich mit stumpf zugespitzten oder fast kopfförmigen Enden. Querstreifen wie bei N. Bottnica, in der Mitte radial, abwechselnd verkürtz, and den Enden die radiale Richtung verleirend, 14-16 in 0,01 mm., in der Mitte etwas entfernter. Lange 0,023-0,037 mm., Schaalenbreite 0,01-0,012 mm.

  • Author
    Grunow 1880
  • Length Range
    23-37 µm
  • Striae in 10µm

Cite This Page

Kociolek, P. (2011). Navicula salinarum. In Diatoms of North America. Retrieved May 18, 2024, from https://diatoms.org/species/navicula_salinarum


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