• Category
  • Length Range
    14-18 µm
  • Width Range
    3.6-4.5 µm
  • Striae in 10 µm
    26-28 in the center valve, 30-32 at the ends
  • Synonyms
    Navicula subfasciata R.M.Patrick (Replaced synonym)



Valves are lanceolate with capitate apices. The axial area is linear and narrow. The central area is elliptic, or rectangular. Striae are strongly radiate and bent. Areolae are circular and number approximately 56-64 in 10 ┬Ám. The raphe is filiform, with slightly expanded proximal ends. Internally, silica bars are present at the valve apices.


Original Description

  • Basionym
    Navicula subfasciata
  • Author
    R.M.Patrick 1959
  • Length Range
    15-18 µm
  • Width
    3-5 µm
  • Striae in 10µm

Original Images

Nasubfasciata  Orig Ill001
Nasubfasciata  Orig Descr001

Cite This Page

Potapova, M. (2013). Sellaphora subfasciata. In Diatoms of North America. Retrieved June 19, 2024, from https://diatoms.org/species/sellaphora_subfasciata


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