Description: The cells are slender (L/W (15)–20–30–(40)) , spindle-shaped, almost straight, only slightly curved towards the cell ends, convex in the middle on the belly side. The cell ends are obliquely rounded, cell wall delicately striped, colorless to slightly brownish, without girdle bands. Similar forms are Closterium setaceum (is slimmer) and Closterium rostratum (significantly plumper).

Dimension: Length (200)–300–550–(700) µm, width (13)–15–25–(28) µm.

Occurrence:  Widely found in shore zones of clean lakes, ponds and other small bodies of water, sometimes also in plankton.

Left: Original graphic by Prof. Lenzenweger.
Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.

Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.