The species was named in honour of Belgian lichenologist Emmanuël Sérusiaux upon his retirement from the University of Liège.

The type specimen was collected by the second author south of Puerto Vallarta in the Mexican state of Jalisco, close to Los Arcos National Underwater Park; there, it was found growing on granitic boulders on the beach.

[2] The thallus of Fulvophyton serusiauxii is thick, areolate, and cream-coloured, with a matte appearance and water-absorbing properties.

Fulvophyton calcicola, found on the Atlantic coast in Florida, grows on calcareous rock and contains no secondary compounds.

[2] Fulvophyton serusiauxii is only known from its type locality in Mexico, where it grows on granite boulders near the Pacific Ocean shore.