Synarthrophyton is a genus of thalloid red algae comprising eight species.

The monomerous, crustose thalli are composed of a single system of filaments which grow close to the underlying surface.

Synarthrophyton reproduces by means of flask-shaped multiporate conceptacles; it produces tetraspores and dispores.

[2] The valid species currently considered to belong to this genus are:

This Rhodophyta-related article is a stub.