Thalassiosira visurgis Hustedt

Diameter: 18

Punctae: 16

Spines: 15

Collection 1317

Other images

More information

Return to Top Page Return to Genera List Return to Species List

Authority information

Thalassiosira visurgis Hustedt 1957, p. 207, 1/1-4 (VanLandingham VII 1978).

Other images

The image of this specimen was captured using DIC. It helps to distinguish fine detail.

More information

The valve is cilindrical with a slightly convex face. Areolae are aranged in radial patterns, more concentrated near the center of the valve. There is a submarcinal carona of spines and two (or rarely 1 or 4) large spinesjust inside the circle of smaller spines. A single slime poor is usually near the geometric center of the valve. (Stoermer and Yang 1969).

Ecological distribution

This species has been found to be in inland waters with high dissolved solids content and in bracish water.(Stoermer and Yang 1969).

Size ranges and morphology

  • Diameter is 14 to 23 micrometers (Stoermer and Yang 1969).
  • Areolae are 16 in 10 micrometers (Stoermer and Yang 1969).
  • Spines are about 14 to 15 in 10 micrometers (Stoermer and Yang 1969).