Phylum Porifera Grant, 1836 - sponges
Class Demospongea Sollas, 1875
see Class Demospongiae Sollas, 1885
Subclass †Lithistida Schmidt, 1870
Order Spirosclerophorida Reid, 1963
Suborder Rhizomorina Zittel, 1895
Superfamily Platychonioidea Schrammen, 1924
Family Platychoniidae Schrammen, 1924
1 Genus †Bothrolemma Schrammen, 1936
2 Genus †Chonellopsis Schrammen, 1936
3 Genus †Hyaloderma Oppliger, 1921
4 Genus †Platychonia Zittel, 1878
5 Genus †Amphibleptula Schmidt, 1879