Leucettidae
Encyclopedia
Leucettidae is an order
Order (biology)
In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

 of sea sponges in the subclass Calcinea
Calcinea
Calcinea is a subclass of the calcareous sponges....

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