Unicellular chlorophyte with an ovoid cell shape and a long straight spine extending from each end of the cell. There is a single cup-shaped chloroplast. Some authors include this genus within Micractinium.
Found in the plankton of lakes and ponds
![[Diacanthos] (sewage pond), X640. Photo: Otago Regional Council & Manaaki Whenua Image](/assets/Tools-And-Resources/Identification/algae/diacanthos640__ScaleWidthWzEwMjRd.jpg)