Pinnularia legumen Ehr.
Length:130

 Width:21

 Striae:9






























Collection 1404

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Authority information

Pinnularia legumen (Ehr.) Ehr., Phys. Abh. Akad. Wiss. Berlin, for 1841: pl. 4(1), fig. 7. 1843(Patrick and Reimer 1966).

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This species is valve linear to slightly lanceolate with triendulate margins and subrostrate, broadly rounded ends. This species is very similar to Pinnularia divergens var. undulata, but differs in that the central area does not form a fascia orpossess a thickening on each side of the valve(Patrick and Reimer 1966).


  • Type Locality
    West Point, New York; fossil [U.S.A] (Patrick and Reimer 1966).

  • Synonyms
    Navicula legumen Ehr., Ber. Akad. Wiss. Berlin, for 1841:144. 1841. [In this reference the name is listed, but the taxon is not described.] (Patrick and Reimer 1966).
  • Ecology
    This taxon prefers water of low nutrient content and is pH indifferent(Patrick and Reimer 1966; Beaver 1981).

    Size ranges and morphology

  • Length is 60 to 130 micrometers (Patrick and Reimer 1966).
  • Width is 15 to 23 micrometers (Patrick and Reimer 1966).
  • Striae are 8 to 12 in 10 micrometers (Patrick and Reimer 1966).