Thallus dark greenish brown to brown-black; hymenial algae globose-cuboid; asci 2-spored; ascospores 32–50 × 14–20 µm, medium to dark brown

S. fissa

Thallus pale grey to pale or dark grey-brown; hymenial algae elongate-cylindrical; asci 8-spored; ascospores 18–28 × 9–14 µm, colourless to pale yellowish brown

S. pallidopora

McCarthy (2001f)