Eunotia praerupta
Length:31.5

 Width:7

 Striae:9-11






























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Authority information

Eunotia praerupta Ehr., Phys. Abh. Akad. Wiss. Berlin, for 1841:414. 1843(Patrick and Reimer 1966).

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The frustles in the girdle view are rectangular. The ventral margin is usually slightly concave at the center, straight at the ends of the valve; sometimes almost straight throughout the entire length. The dorsal margin is convex; narrowed, often reflexed at the ends to form truncate, somewhat capitate apices. The dorsal margin is sometimes not so formedand the ends are truncate-rostrate. The terminal nodules are distinct, at the ends of the valve, extending upwards along the apices. The striae are parallel.(Patrick and Reimer 1966).


  • Type Locality
  • Synonyms
  • Ecology
    This taxon is is usually found in in northern or mountainous localities in acid to circumneutral water(Patrick and Reimer 1966).

    Size ranges and morphology

  • Length is 20-100 micrometers (Patrick and Reimer 1966).
  • Width is 4-15 micrometers (Patrick and Reimer 1966).
  • Striae are 6-13 in number (Patrick and Reimer 1966).