 "Fuscocerrena" was circumscribed by Norwegian mycologist Leif Ryvarden in 1982 to contain the fungus originally described by Elias Fries as "Polyporus portoricensis".This species was also previously placed in "Cerrenella", a genus proposed by William Murrill in 1905, but later abandoned.The genus is characterized by its irregular fruit body that when fresh is farinose (covered by a white, mealy powder) and greenish white in colour; older fruit bodies become dark brown.