Maximum likelihood phylogenetic tree based on 935-bp 28S rDNA. Bootstrap support values are indicated near nodes.

 
 
  Part of: Tsuyuki A, Kajihara H (2020) A giant new species of Enchiridium (Polycladida, Prosthiostomidae) from southwestern Japan. ZooKeys 918: 15-28. https://doi.org/10.3897/zookeys.918.47061