• Category
  • Diameter
    6.3-11.8 µm
  • Width Range
    2.6-4.7 µm
  • Striae in 10 µm
    10 to 15 based on circumferential density



Colonies are often preserved in samples. In girdle view, frustules are barrel-shaped cells. The valve faces of neighboring cells may be linked in in short to long chains by marginal spines. In valve view, the face is round and flat, with a deep mantle. Areolae at the center of the valve are arranged in a weak annulus. Uniseriate striae radiate from center to the valve margin. Areolae number 15-17 in 10 µm. Linking spines are present on each interfascicle, at the mantle-face junction. In girdle view, marginal fultoportulae can be observed below every third or fourth interfascicle on the valve mantle. Central fultoportulae are absent.


Stephanodiscus binderanus is reported from across the Laurentian Great Lakes (Reavie and Kireta 2015) and has been reported as a nuisance alga because it clogs water treatment systems and creates foul tastes and odors in the water (Hohn 1969). Several authors have found this taxon to bloom during eutrophic conditions (Stoermer and Yang 1969, Munawar and Munawar 1976). Paleolimnological evidence shows that S. binderanus was introduced to the Laurentian Great Lakes in the 1940s (Stoermer et al. 1985, Spaulding et al. 2010); however, it has been reported from the paleo-record in Lake Simcoe, Ontario, Canada as early as the late 17th century (Hawryshyn et al. 2012).

Credit: USGS/BioData
Distribution of S. binderanus in rivers of the continental U.S. based on the National Water Quality Assessment program. Retrieved September 9, 2016.

Original Description

  • Basionym
    Melosira binderana
  • Author
    Kütz. 1844

Original Images

Sbinderana  Orig Ill
Sbinderana  Orig Descr

Citations & Links



Cite This Page

Edlund, M, and Burge, D. (2016). Stephanodiscus binderanus. In Diatoms of North America. Retrieved July 21, 2018, from https://diatoms.org/species/stephanodiscus_binderanus


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