Desmidium C.A. Agardh

Cells joined to form twisted or rarely straight filaments, sometimes enveloped in a mucilaginous sheath. Cells usually broader than long, often compressed, with distinct but only moderate deep constrictions. (Croasdale, H., Flint, E. & Racine, M. 1994. Flora of New Zealand Desmids III. - Landcare Research New Zealand Ltd.)

Desmidum swartzii C.A. Ag.
Dimensions: L. 12–21 µm, B. 35–50 µm. Coesel 1994, Lenzenweger 1996.