Cupulospongia

Cupulospongia is an extinct genus of sea sponges from the Cretaceous of France.
"C. elegans" is vase shaped with a stout stalk. It is known from the sponge beds at Barrou, France.
The taxonomic position of the genus is unclear. "Cupulospongia rimosa" Roemer, 1864 is classified in Theonellidae while "Cupulospongia tenuis" Roemer, 1864 is in Azoricidae, both Demospongiae in the order Tetractinellida.