Turbellaria genera

Pseudoceros is a genus of the flatworms Platyhelminthes.

Thysanozoon is a genus of polyclad flatworms belonging to the family Pseudocerotidae.

Pseudobiceros is a genus of flatworms. Like all flatworms, Pseudobiceros are hermaphrodites. This particular genus engages in penis fencing. When the "winner" touches its penis to the "skin" of the other, insemination occurs, and the "loser" has to bear the burden of motherhood.

Macrostomum is a genus of flatworm with a worldwide distribution, with over a hundred species described to date. These hermaphroditic, free-living flatworms are usually small in size, with large species reaching up to 5 mm in body length (e.g. Macrostomum tuba). They are usually transparent, and the smaller species appear rather round in cross-section than dorsoventrally flattened.

Yungia is a genus of flatworms.

Cylindrostoma is a genus of flatworms in the family Cylindrostomidae.

Pseudostomum is a genus of flatworms in the family Pseudostomidae.