Photograph of the South American land planarian Polycladus gayi (from Grau and Carbayo 2010).

 
 
  Part of: Sluys R (2019) The evolutionary terrestrialization of planarian flatworms (Platyhelminthes, Tricladida, Geoplanidae): a review and research programme. Zoosystematics and Evolution 95(2): 543-556. https://doi.org/10.3897/zse.95.38727