Diploneis finnica (Ehr.)
Length:51

 Width:29

Costae:7






























Collection 1779

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Authority information

(Ehr.)Cl., acta Soc. Fauna Fl. Fennica, 8(2):43, pl.2, fig. 11. 1891.

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This image was taken utilizing DIC for the specimen above.






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The valve of this taxon is elliptical. It has a siliceous rib that encloses the raphe valve. The raphe valve is broad and well developed. The central area is elliptical as well. There are distinct, narrow extensions of the central area. The longitudinal canals are broad and the ends of the raphe valve are far apart. There are one or two rows of pores on the outer surface of this taxon. There are two rows of alveoli between the costae (Patrick and Reimer 1966).


  • Type Locality
    Connecticut, Washington,Oregon (Patrick and Reimer 1966).
  • Ecology
    This taxon prefers fresh water that is standing. Small amounts of salt don't affect this taxon (Patrick and Reimer 1966).

    Size ranges and morphology

  • Length is 35 to 85 micrometers (Patrick and Reimer 1966).
  • Width is 25 to 45 micrometers (Patrick and Reimer 1966).
  • Costae are 7 to 8 in 10 micrometers (Patrick and Reimer 1966).
  • Alveoli are 12 in 10 micrometers (Patrick and Reimer 1966).