Stylobryon is a monotypic genus of golden algae in the family Dinobryaceae. It has one known species Stylobryon insignis .
Stylobryon has been found in numerous lakes, notably Lake Erie.
In 1866, Alfred Cheatham Stokes, described Stylobryon abbottii in North America. This is now accepted as Poteriodendron petiolatum var. abbottii .