Aphanostoma is a genus of acoel flatworms in the family Isodiametridae.

They rely on ciliary gliding to move around.

They really on ocelli for vision which are small simple eyes, found in many invertebrates, usually consisting of a few sensory cells and a single lens.

They move around by ciliary gliding which is a type of locomotion in which an animal moves on a secreted layer of mucus, propelled by the beating of cilia.

[1] The species of this genus are found in Europe.