A very small (<2 cm) flatworm from Europe that is well established in New Zealand. There are two other, probably adventive, species here in New Zealand but very few specimens have been collected and they remain unidentified. These and Rhynchodemus sylvaticus have two small eyes close to the anterior end distinguishing them from all others that belong to the family Geoplanidae. Members of that family have numerous extremely small eyes (small black dots) concentrated at the anterior end and then fewer down the sides of the body to the posterior end.