Protomonaxonida

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