• Category
  • Length Range
    24-62 µm
  • Width Range
    2.7-4.4 µm
  • Striae in 10 µm
    11-14 in the center valve, 16-18 at the ends

Identification

Description

Ventral margin is concave. Dorsal margin is convex. The apices are set off by a change in slope of the dorsal margin. The ends are narrowed, extended, and rostrate. The helictoglossae are not visible in the LM. Striae are radiate. Areolae are unresolved in the LM.

Autecology

Eunotia mydohaimasiae is associated with wet walls, and can be epiphytic on bryophytes or associated with algal slime or epilithon.

Gsm 8 10 05 10 Seep
Credit: Paula C. Furey
Type locality: seep wall above Rock Creek along Snake Den Ridge Trail in the Great Smoky Mountains National Park.
Gsm 7 19 05 9 Seep Wall
Credit: Paula C. Furey
Eunotia mydohaimasiae was collected from this seep wall along Enloe Creek Trail in the Great Smoky Mountains National Park.

Original Description

Valves concave on the ventral margin, convex on the dorsal margin, with apices set off by a change in slope of the dorsal margin, 24 – 62 μm long, 2.7 – 4.4 μm wide. Ends narrowed, extended, rostrate. Helictoglossae not visible in light microscope. Rimoportula at one valve end. Striae radiate, 11 – 14 in 10 µm at the valve center, 16 – 18 in 10 μm near the valve apices, Puncta unresolved in light microscope.

  • Author
    Furey, Lowe and Johansen 2011
  • Length Range
    24-62 µm
  • Width
    2.7-4.4 µm
  • Striae in 10µm
    11-14 in the center valve, 16-18 at the ends

Original Images

Eunotia Mydohaimasiae Platescan
Eunotia Mydohaimasiae  Textscan

Cite This Page

Furey, P. (2011). Eunotia mydohaimasiae. In Diatoms of North America. Retrieved July 21, 2018, from https://diatoms.org/species/eunotia_mydohaimasiae

Responses

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