Closterium diane
image © Alfred van Geest (mouse-over)

Closterium dianae. Notice evenly curved cell with slight belly; apices with end-pore (mouse-over).
Cell dimensions (L x B): 300 x 28 µm



 


Desmid of the Month
August 2025

Closterium dianae


Cells of Closterium dianae are remarkably evenly curved and in the mid-region of the ventral side often a little bit inflated ('belly'). An essential characteristic is the shape of the apex: obliquely truncate with a distinct end-pore. Based on size and slenderness of the cells several varieties have been described. Zygospores are globose and smooth-walled. In the Netherlands, Closterium dianae is of rather common occurrence in various mesotrophic pools. Zygospores were encountered but a few times.

Closterium dianae
image © Alfred van Geest

A cell of Cl. dianae with smaller dimensions (180 x 15 µm, var. minus).

Closterium dianae
Image © Marien van Westen

Cl. dianae with globose, smooth-walled zygospore.