Phylum Porifera Grant, 1836 - sponges Subphylum Hexactinellida Schmidt, 1870 see Class Hexactinellida Schmidt, 1870 Class Amphidiscophora F.E. von Schulze see Subclass Amphidiscophora Schulze, 1886 Order Amphidiscosida Schrammen, 1924 Family Monorhaphididae Ijima, 1927 Genus Monoraphis F.E. von Schulze, 1904 see Genus Monorhaphis Schulze, 1904