Desmid of the month
November 2006

Actinotaenium diplosporum

A. diplosporum is notable because of its very wide and shallow sinus rendering the cell a somewhat guitar-shaped outline. In addition to that, cells are characterized by asteroid chloroplasts whereas conjugation results in the formation of twin zygospores. In the Netherlands A. diplosporum is only known from a few mesotrophic moorland pools.

Vegetative cell of Actinotaenium diplosporum (forma maius) displaying asteroid chloroplasts.

Cell dimensions (L x B): ca 105 x 50 µm


Conjugated cells of A. diplosporum with twin zygospore.