Actinotaenium mooreanum. Notice small-sized, elliptic cell that is hardly constricted in the middle.

Cell dimensions (L x B): 20 x 13 µm

Interference contrast picture of Actinotaenium mooreanum showing a big, mucilaginous envelope enclosing the cell.



Desmid of the month
March 2016

Actinotaenium mooreanum

A. mooreanum may be distinguished from other small-sized Actinotaenium species  by its perfectly elliptic, hardly constricted cells. Often the cell sinus is hardly visible. Semicells have a lobo-stelloid chloroplast containing a single, more or less central pyrenoid. In the Netherlands, A. mooreanum is a rare species, only known from some wet moorland sites in the province of Drenthe.

Another cell of A. mooreanum well showing lobo-stelloid chloroplasts containing a single pyrenoid.