The modern definition of the genus follows the description given by Gilbertson and Ryvarden (1986), in their monograph North American Polypores.
現時薄孔菌屬的分類是由 Gilbertson 及 Ryvarden (1986) 在他們的著作《北美多孔菌屬》（North American Polypores）裡確定的。