Leuconia
Encyclopedia
is a genus of calcareous sponge
Calcareous sponge
The calcareous sponges of class Calcarea are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made out of calcium carbonate in the form of calcite or aragonite...

s belonging to the family Grantiidae
Grantiidae
Grantiidae is a family of the order Leucosolenida.-References:*...

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