Unicellular desmid with two ovoid semicells divided by a deep constriction or isthmus. Each semicell has 4 or more external spines perpendicular to the surface from which they arise, and 2 or more green chloroplasts.
Xanthidium, X400. Photo: Phil Novis, Manaaki Whenua
![[Xanthidium], X400. Photo: Phil Novis, Manaaki Whenua Image](/assets/Tools-And-Resources/Identification/algae/xanthidium_phil__ScaleWidthWzEwMjRd.jpg)