Calcaronea

{{short description|Subclass of sea sponges}}

{{Automatic taxobox

| image = Leucandra losangelensis 214277336.jpg

| image_caption = Leucandra losangelensis (order Leucosolenida, family Grantiidae)

| taxon = Calcaronea

| authority =

| subdivision_ranks = Orders

| subdivision = * Baerida

• Leucosolenida
• Lithonida
• †Sphaerocoeliida?
• †Stellispongiida?

}}

Calcaronea is a subclass of sea sponges in the class Calcarea. They are Calcarea with the triactines and the basal system of tetractines sagittal (i.e. the rays of the spicule make unequal angles with each other), exceptionally regular. In ontogeny the first spicules to be secreted are diactines. Choanocytes are apinucleate. Calcaronea have amphiblastula larvae