Theonellidae

Theonellidae is a family of sponges belonging to the order Tetractinellida,^[1] which was first described by Robert von Lendenfeld in 1903.^[1][2]

Theonellidae
Discodermia ramifera
Scientific classification
Kingdom:	Animalia
Phylum:	Porifera
Class:	Demospongiae
Order:	Tetractinellida
Suborder:	Astrophorina
Family:	Theonellidae Lendenfeld, 1903

Theonella conica is known for hyperaccumulation of molybdenum due to the action of an endosymbiont microbe, Entotheonella sp.^[3]

Genera

• Colossolacis Schrammen, 1910^[1]
• Dactylocalcites^[1]
• Discodermia du Bocage, 1869^[1][4][5]
• Manihinea Pulitzer-Finali, 1993^[4][5]
• Racodiscula Zittel, 1878^[4][5]
• Siliquariaspongia Hoshino, 1981^[4][5]
• Theonella Gray, 1868^[4][5]