: Ceriodaphnia rotunda.

Ceriodaphnia rotunda has a more or less circular shape and the ventral part of its small head is somewhat pointed and ends in a rounded tip carrying 4–6 small teeth. It is only found in Southeast Norway.

Ceriodaphnia rotunda Sars
Creative Commons Attribution | Bjørn Walseng | Norsk institutt for naturforskning
Kart. Utbredelse i Norge.