Pinnularia nodosa (Ehr.) W.Sm.
Length:57

 Width:9

Striae:10






























Collection 1787

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Authority information

Pinnularia nodosa (Ehr.) W. Sm., Syn. British Diat., vol. 2, p. 96. 1856(Patrick and Reimer 1966).

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This image was of the same specimen above, at a different focus depth.







This image was taken utilizing DIC for the specimen above.


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Valve linear, triundulate, central inflation broader than the other two; rostrate to rostrate-capitate(Patrick and Reimer 1966).


  • Type Locality
    Bei Berlin [Germany] (Patrick and Reimer 1966).

  • Synonyms
    Navicula nodosa Ehr. Infusionsthierchen, p. 179, pl. 13, fig. 9. 1838(Patrick and Reimer 1966).
    Pinnularia nodosa f. capitata Cl., K. Sveniska Vet.-Akad. Handl., Ny Foljd, 27(3): 87. 1895(Patrick and Reimer 1966).

  • Ecology
    Prefers cool water and water of low mineral content although sometimes found in other types of water. Found in a wide range of pH and habitats(Patrick and Reimer 1966; Beaver 1981).

    Size ranges and morphology

  • Length is 35 to 75 micrometers (Patrick and Reimer 1966).
  • Width is 9 to 18 micrometers (Patrick and Reimer 1966).
  • Striae are 7 to 11 in 10 micrometers (Patrick and Reimer 1966).