Landplanarians are known from almost all parts of the world which have a hot but at the same time a damp climate. So they are met with in Brazil, in South-Africa, in South-Asia, in Australia and in New-Zealand, whereas in the colder regions of the globe merely few species exist. They avoid direct sunlight and are only found in shadowed places, under stones, under the bark of trees, under rotten wood a. s. o., feeding on small snails and earthworms.