• Category
  • Length Range
    35-100 µm
  • Width Range
    5-9 µm
  • Striae in 10 µm



Valves are linear and slightly concave in the middle. The apices are protracted slightly and bluntly rounded. The raphe is excentric, with fibulae numbering 8-11 in 10 µm. Striae appear costate, rather than distinctly punctate. A longitudinal fold is present and extends the length of the valve.


Original Description

  • Basionym
    Nitzschia hungarica
  • Author
    Grunow 1862

EMAP Assessment

EMAP Distribution

Tryblionella Hungarica   Grunow   Mann 3
Map 3

Response Plots

Tryblionella Hungarica   Grunow   Mann

Cite This Page

Kociolek, P. (2011). Tryblionella hungarica . In Diatoms of North America. Retrieved July 22, 2018, from https://diatoms.org/species/tryblionella_hungarica


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