Pinnularia brebissonii var. diminuta(Grun.)Cl.
Length:34

 Width:6

 Striae:11






























Collection 1788

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Authority information

Pinnularia brebissonii var. diminuta (Grun. in V. H.) Cl., K. Svenska Vet.-Akad. Handl., Ny Foljd, 27(3):78. 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-lanceolate, gradually narrowing to rounded ends. This variety differs from the nominate variety in that it is smaller and the striae are not quite as strongly angled (Patrick and Reimer 1966).


  • Type Locality
    Frahan (Delogne) [Belgium] (Patrick and Reimer 1966)

  • Synonyms
    Navicula brebissonii var. diminuta Grun. in V. H., Syn. Diat. Belgique, pl. 5, fig. 8. 1880(Patrick and Reimer 1966).
    Pinnularia microstauron var. brebissonii f. diminuta (Grun. in V. H.) Hust. in Pasch., Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 322, fig. 585. 1930(Patrick and Reimer 1966).

  • Ecology

    Size ranges and morphology

  • Length is 20 to 33 micrometers (Patrick and Reimer 1966).
  • Width is 7 to 8 micrometers (Patrick and Reimer 1966).
  • Striae are 10 to 12 in 10 micrometers (Patrick and Reimer 1966).