• Category
  • Length Range
    7.4-20.6 µm
  • Width Range
    2-3 µm
  • Striae in 10 µm



Valves are small, linear-lanceolate with acute ends. The keel is marginal along the edge of valve face. Striae are sometimes visible under LM. Costae are typically parallel to one another, measuring in 8-9 in 10 µm.


Original Description

D. subtilis nov. spec. Klein (0.0005-0.0010” lang), Schalen schmas linear lanzettlich mit spitzen Enden, Rippen zart 18-22 in 0.001”, Querstreifen über 40 in 0.001”. Im brackischen Wasser.

  • Author
    Grunow 1862
  • Length Range
    12.7-25.4 µm
  • Striae in 10µm
    > 15.7

Original Images

Denticula Subtilis Orig Desc Text

Cite This Page

Desianti, N. (2016). Denticula subtilis. In Diatoms of North America. Retrieved May 29, 2024, from https://diatoms.org/species/denticula_subtilis


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