Pinnularia divergens var. elliptica (Grun.) Cl.
Length:60

 Width:12

 Striae:16






























Collection 1788

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Authority information

Pinnularia divergens var. elliptica (Grun.) Cl., K. Svenska Vet.-Akad. Handl., Ny Foljd, 27(3):79. 1895(Patrick and Reimer 1966).

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This image was taken utilizing DIC for the specimen above.


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Valve linear-elliptical, narrowing toward rounded ends. Axial area one-fifth the breadth of the valve, widening into the rhomboid central area on each side of which is the thickening characteristic of Pinnularia divergens. Raphe filamentous; terminal fissures "bayonet" shaped. Striae radiate at the center of the valve, convergent troward the ends (Patrick and Reimer 1966).


  • Type Locality
    Franz Josefs-Land (Patrick and Reimer 1966)
  • Synonyms
    Navicula divergens var. elliptica Grun., Denkschr. Akad. Wiss. Wien, Math.-Naturw. Cl., 48:98, pl. 1, fig. 19. 1884 (Patrick and Reimer 1966).

  • Ecology
    This taxon seems to prefer cool water. It has been found in a wide range of pH enviroments and habitats(Patrick and Reimer 1966; Beaver 1981).

    Size ranges and morphology

  • Length is 50 to 100 micrometers (Patrick and Reimer 1966).
  • Width is 15 to 26 micrometers (Patrick and Reimer 1966).
  • Striae are 7 to 11 in 10 micrometers (Patrick and Reimer 1966).