• Category
  • Length Range
    48-85 µm
  • Width Range
    4.7-7 µm
  • Striae in 10 µm
  • Synonyms
    Nitzschia vitrea var. recta (Hantzsch in Rabenh.; Grunow in Cleve and Grunow) Van Heruck



Frustules are rectangular in girdle view. Valves are flat, linear to linear-lanceolate, with wedge-shaped ends. Apices are beak-like, rounded, and somewhat rostrate. The raphe is positioned at the valve margin. A conopeum is visible sometimes in LM. Striae are visible in large specimens. Fibulae are long (1-2 µm) and irregularly spaced, 6-8 in 10 µm.

Original Description

Original Images

Nitzschia recta NEW3 slide 11381 ISOTYPE
Nitzschia recta 9 slide 11381 ISOTYPE

Citations & Links


  • Index Nominum Algarum
  • North American Diatom Ecological Database
    NADED ID: 48029

Cite This Page

Manoylov, K. (2010). Nitzschia recta. In Diatoms of North America. Retrieved May 20, 2024, from https://diatoms.org/species/nitzschia_recta


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