Desmid of the month
Cl. delpontei is a rather large-sized, elegantly shaped Closterium species *. Cells are about straight in the middle region (the ventral side more
or less inflated) and from there gradually attenuate to the slightly curved
ends. The cell wall is distinctly striate and usually yellow-brownish coloured.
Most striking are its twin zygospores: couples of urn-shaped spores turned with
their truncate side to each other. In the Netherlands, Cl. delpontei is
of occasional occurrence in mesotrophic fen hollows and moorland pools.
Zygospores are only incidentally encountered.
delpontei is closely allied to Cl. lineatum, intermediate forms are
hard to identify.
Image © Henk Schulp
Cell dimensions (L
x B): 650 x 27 µm