See text Sanmai is an extinct genus of tettigarctid cicada from the Late Triassic to the Middle Jurassic.

The name is derived from the Mandarin san (three) and mai (branch) in reference to a certain vein of the wing being three-branched.

It undoubtedly belong to the subfamily Cicadoprosbolinae; however, placing it in a tribe has proved difficult.

Sanmai possesses "light and irregular speckles and lon-gitudinal stripes boldly contrasting to dark membrane, " which were likely designed to camouflage it from the many insectivourus creatures of the Jiulongshan Formation.

Still, due to the incompletely preserved tegmen, it is unclear whether the vein M3+4 is forked or simple as in this genus.