Eunotia serra
Length:48

 Width:13.5

Striae:12

 Puncta:































Collection 1174

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Authority information

Eunotia serra Ehr. , Ber. Akad. Wiss. Berlin, for 1837:1845. 1837 (Patrick and Reimer 1966).

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The frustles in the girdle view are rectangular. The ventral margin is straight at the ends, concave toward the center of the valve. The dorsal margin is convex with from four to twenty undulations. Length of the valve varies with the number of undulations. The apices of the valve are rounded and not distinctly differentiated from the main body of the valve. The terminal nodules are distinct, on the ventral margin, a short distance from the apices of the valve. Striae are distinctly or indistinctly punctae. Striae are parallel and radiate over the terminal modules(Patrick and Reimer 1966).


  • Type Locality
  • Synonyms (Patrick and Reimer 1966)
    Eunotia bisoctonariaEhr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia decaodon Ehr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia endecaodon Ehr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia enneodonEhr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia heptodonEhr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia icosodonEhr., Ber. Akad. Wiss. Berlin, for 1840:210. 1840.
    Eunotia octodonEhr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia serrulataEhr., Ber. Akad. Wiss. Berlin, for 1840:209. 1840.
    Eunotia septenaEhr., Phys. Abh. Akad. Wiss. Berlin, for 1841:pl. 4(2), fig. 13. 1843.
    Eunotia polyodonEhr., Ber. Aikad. Wiss. Berlin, for 1845:77. 1845.
    Eunotia hendecaodonEhr., Mikrogeol., pl. 4(1), fig. 19. 1854.
    Eunotia dodecaodonEhr., Mikrogeol., pl. 4(1), fig. 20. 1854.
    Eunotia prionotusEhr., Mikrogeol., pl. 17(1), fig. 41. 1854.
    Eunotia quindenariaEhr., Mikrogeol., pl. 17(1), fig. 42. 1854.
    Eunotia scalarisEhr., Mikrogeol., pl. 17(1), fig.44. 1854.
    Eunotia quatuordenariaEhr., Mikrogeol., pl. 33(10), fig. 6. 1854.
    Eunotia tredenariaEhr., Mikrogeol., pl. 33(10), fig. 9. 1854.
    Eunotia undenariaEhr., Mikrogeol., pl. 33(10), fig. 12. 1854.
    Eunotia robustaRalfs in Pritch., Hist. Infusoria, 4th ed., p. 763. 1861. (in part).
    Eunotia var. polyodon Meist., Beitr. Kryptog.-Fl. Schweiz, 4(1), pl. 11, fig. 1 1912.

  • Ecology
    This taxon is commonly found in oligotrophic or dystrophic water (Patrick and Reimer 1966).

    Size ranges and morphology

  • Length is 50-150 micrometers (Patrick and Reimer 1966).
  • Width is 5-25 micrometers (Patrick and Reimer 1966).
  • Striae are 10-14 in number (Patrick and Reimer 1966).