• Category
  • Length Range
    12-22 µm
  • Width Range
    4.5-5.3 µm
  • Striae in 10 µm



Valves are lanceolate with protracted, subrostrate ends. The axial area is narrow and linear. The central area is small. Striae are radiate in the center and convergent at the apices, numbering 14-16 in 10 µm. Areolae are approximately 32-36 in 10 µm and hardly distinguishable in LM. Striae are bent in the middle of the valve. Short striae often alternate with longer ones around the central area.

The original description includes larger specimens with rostrate-capitate apices; we have not encountered similar specimens in North American collections.


Original Description

  • Author
    Lange-Bert. in Lange-Bert. and Krammer 1989
  • Length Range
    12-26 µm
  • Width
    5-6 µm
  • Striae in 10µm

Original Images

Nareichard  Or Ill001
Nareichard  Or Descr001

EMAP Assessment

EMAP Distribution

Navicula Reichardtiana  Lange  Bertalot 3
Map 3

Response Plots

Navicula Reichardtiana  Lange  Bertalot

Cite This Page

Potapova, M. (2011). Navicula reichardtiana . In Diatoms of North America. Retrieved August 20, 2018, from https://diatoms.org/species/navicula_reichardtiana


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