(Pensoft Publishers) A huge invertebrate diversity is hidden on the forest floor in the Araucaria moist forest. Land flatworms constitute a numerous group among these invertebrates occurring in the Neotropical region. Three new species of land flatworms were described from areas covered by the Araucaria moist forest in South Brazil. The new species were named after their characteristic color pattern. The study was published in the open-access journal ZooKeys.