Phylum Porifera Grant, 1836 - sponges
Class Hexactinellida Schmidt, 1870 - hexactinellids
Subclass Hexasterophora Schulze, 1886
Order Hexactinosa Schrammen, 1903
see Order Hexactinosida Schrammen, 1903
Family Euretidae Zittel, 1877
Subfamily Euretinae Zittel, 1877
01 Genus †Alosculum Wu, 1990
02 Genus †Dracospongia Rigby, Xichun & Jiasong, 1998
03 Genus †Radioplica Wu, 1990
04 Genus †Linonema de Laubenfels, 1955
05 Genus †Mastodictyum Sollas, 1883
06 Genus †Ordinatus de Laubenfels, 1955
07 Genus †Plectospyris Sollas, 1883
08 Genus †Polypyge Schrammen, 1936
09 Genus †Ramispongia Quenstedt, 1877
10 Genus †Eurete Semper, 1868
11 Genus †Verrucocoelia Étallon, 1859
12 Genus †Blondetia Hérenger, 1944
13 Genus †Lopanella Pocta, 1883
14 Genus †Nemarete Reid, 1961
15 Genus †Pseudocavispongia Hérenger, 1944
16 Genus †Wapkiosa de Laubenfels, 1955
17 Genus †Zittelispongia Sintzov', 1879
18 Genus †Myliusia Gray, 1859
19 Genus †Pararete Ijima, 1927
20 Genus †Periphragella Marshall, 1875
21 Genus †Pleurochorium Schrammen, 1912
22 Genus †Heterochone Ijima, 1927
23 Genus †Plecteurete Herrmann-Degen, 1980