Pinnularia virdis Nitz.
Length:65

 Width:12

 Striae:10






























Collection 1784

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Authority information

Pinnularia virdis (Nitz.) Ehr., Phys. Abh. Akad. Wiss. Berlin, for 1841:305, 385, pl. 1(1), fig. 7; pl. 1(3), fig. 3; pl. 1(4), fig. 3; pl. 2(1), fig. 22; pl. 2(3), fig. 1; pl. 2(5), fig. 2; pl. 2(6), fig. 21; pl. 3(1), figs. 1-2. 1843(Patrick and Reimer 1966).

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Valve linear, narrowing toward rounded ends. The nomiate variety of this species is distinguished by the narrow axial area, small central area, and almost parallel striae throughout most of the valve(Patrick and Reimer 1966).


  • Type Locality
    Germany, Halle(Patrick and Reimer 1966).

  • Synonyms
    Navicula virdis (Nitz.) Ehr., Infusionsthierchen, p. 182, pl. 13, fig. 16; pl. 21, fig. 12. 1838(Patrick and Reimer 1966).
    Bacillaria virdis Nitz., Neue Schrift. Naturf. Ges. Halle, 3(1):97, pl. 6, figs. 1-3. 1817(Patrick and Reimer 1966).

  • Ecology
    This taxon is found in water of higher mineral content than many of the species belonging to the Pinnularia; seems to prefer circumneutral water. The species is found in a wide range of habitats(Patrick and Reimer 1966; Beaver 1981).

    Size ranges and morphology

  • Length is 50 to 170 micrometers (Patrick and Reimer 1966).
  • Width is 10 to 30 micrometers (Patrick and Reimer 1966).
  • Striae are 6 to 9 in 10 micrometers (Patrick and Reimer 1966).