Pinnularia microstauron (Ehr.) Cl.
Length:45

 Width:9

Striae:10






























Collection 1782a

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Authority information

Pinnularia microstauron (Ehr.) Cl., Acta Soc. Fauna Fl. Fennica, 8(2):28. 1891(Patrick and Reimer 1966).

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This image was taken utilizing DIC for the specimen above.


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Valve linear with usually broadly rostrate ends; occasionally somewhat rounded. This taxon is quite variable and needs a great deal more study to determine if all of the so-called variants really are one taxon(Patrick and Reimer 1966).


  • Type Locality
    Brazil, from soil on roots of plants from Rio de Janeiro(Patrick and Reimer 1966).

  • Synonyms
    Stauroptera microstauron Ehr., Phys. Abh. Akad. Wiss. Berlin, for 1841: 423, pl. 1(4), fig. 1. 1843(Patrick and Reimer 1966).
    Navicula bicapitata var. hybrida Grun. in V. H., Syn. Diat. Belgique, pl. 6, fig. 9. 1880(Patrick and Reimer 1966).

  • Ecology
    Tolerates a wide range of pH and mineral content, but seems to prefer oligotrophic, slightly acid water(Patrick and Reimer 1966; Beaver 1981).

    Size ranges and morphology

  • Length is 25 to 90 micrometers (Patrick and Reimer 1966).
  • Width is 7 to 11 micrometers (Patrick and Reimer 1966).
  • Striae are 10 to 13 in 10 micrometers (Patrick and Reimer 1966).