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Diploneis (Bacillariophyceae)

Diploneis sp.
Note: the shadows or channels on each side of the central canal. This is a characteristic that differentiates between Diploneis and Caloneis.

Diploneis sp. from a lake in New Hampshire, USA

Diploneis sp. from a lake in New Hampshire, USA

Melosira distans (Ehrb.) Kuetz
Sketch by Carlson (1913) from the collection of Manfred Bölter, University of Kiel, DE

Carlson, G.W.F. 1913 Süsswasseralgen aus der Antarktis, Südgeorgien und den Falkland Inseln. From: „Wissenschaftliche Ergebnisse der schwedischen Südpolar-Expedition 1901-1903 unter Leitung von Dr. Otto Nordenskjöld.“ Band IV, Lithographisches Institut.

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