Protomonaxonida is an extinct order of sea sponges. It is a paraphyletic group gathering the most ancient species from the Burgess Shale to modern sponges.
Families and genera
Family †Choiidae Laubenfels, 1925
Genus †Allantospongia Rigby & Hou, 1995
Genus †Choia Walcott, 1920
Genus †Choiaella Rigby & Hou, 1995
Genus †Lenica Goryanskiy, 1977
Family †Halichondritidae Rigby, 1986
Genus †Halichondrites Walcott, 1920
Genus †Pohlispongia Rigby & von Bitter, 2005
Family †Hamptoniidae De Laubenfels, 1955
Genus †Hamptonia Walcott, 1920
Genus †Hamptoniella Rigby & Collins, 2004
Family †Hazeliidae De Laubenfels, 1955
Genus †Crumillospongia Rigby, 1986
Genus †Falospongia Rigby, 1986
Genus †Hazelia Walcott, 1920
Family †Leptomitidae De Laubenfels, 1955
Genus †Leptomitus Walcott, 1886
Genus †Paraleptomitella Chen et al., 1989
Genus †Pseudoleptomitus Botting et al., 2019
Genus †Wareiella Rigby & Harris, 1979
Genus †Lobatospongia Rigby et al., 2007
Family †Piraniidae De Laubenfels, 1955
Genus †Moleculospina Rigby, 1986
Genus †Pirania Walcott, 1920
Family †Takakkawiidae De Laubenfels, 1955
Genus †Takakkawia Walcott, 1920
Family †Ulospongiellidae Rigby & Collins, 2004
Genus †Hapalospongia Rigby & Collins, 2004
Genus †Ulospongiella Rigby & Collins, 2004
Family †Wapkiidae De Laubenfels, 1955
Genus †Wapkia Walcott, 1920
The following families from the order Hadromerida are also sometimes placed in Protomonaxonida: Family Sollasellidae von Lendenfeld, 1887 Genus †Luterospongia Rigby et al., 2008 Genus †Mckittrickella Rigby et al., 2007 Genus †Monaxoradiata Rigby & Bell, 2006 Genus †Opetionella Zittel, 1878 Genus †Rhizopsis Schrammen, 1910 Genus †Stramentella Gerasimov, 1960 Genus †Trichospongiella Rigby, 1971 Family Tethyidae Gray, 1867 Genus Tethya Lamarck, 1814