Figure 2 from: Negrete L, Brusa F (2016) First report of the genus Cratera (Platyhelminthes, Geoplanidae) in Argentina, with description of a new species and comments on the species of the genus. ZooKeys 610: 1-12. https://doi.org/10.3897/zookeys.610.9465 - Negrete, Lisandro (2016)