• Category
  • Length Range
    38.5-44.0 µm
  • Width Range
    7.5-8.0 µm
  • Striae in 10 µm
    31-32 at the center



The valves are linear-lanceolate with rostrate apices. The striae are parallel or slightly radiate at the valve center and parallel along the length of the valve. Areolae comprising the striae are round or oval. At the central area, the striae give the central area a relatively linear appearance, although one or a few areolae may extend onto the central area. Internally, the longitudinal ribs terminate well before both the helictoglossae. The longitudinal ribs are complete on the side of the valve to which the proximal raphe ends are deflected.

These records of F. neomundana are from the Hawaiian Islands. The species has reported from South America, but not from the continental U.S.


Original Description

  • Author
    Lange-Bert. and Rumrich 2000
  • Length Range
    40.0-60.0 µm
  • Width
    8.0-8.6 µm
  • Striae in 10µm

Original Images

Neomundana Oimages
Neomundana Odesc
Original text and images reproduced with permission by Koeltz Scientific Books.

Cite This Page

Graeff, C. (2012). Frustulia neomundana. In Diatoms of North America. Retrieved July 13, 2024, from https://diatoms.org/species/frustulia_neomundana


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