Calcarea (classis)
Calcarea (nomen a Bowerbank anno 1864 inventum, olim Calcispongiae (Blainville, 1834)) sunt maxima classis in phylo Poriferorum.

Bibliographia 
 Hooper, J.N.A.; Soest, R.W.M., van (eds.) 2002: Systema Porifera. Guide to the supraspecific classification of sponges and spongiomorphs (Porifera). New York: Plenum. 
 Nielsen, C. 1995. Animal Evolution: Interrelationships of the Living Phyla. Oxford University Press, Oxford..
 Ruppert, E.E., Fox, R.S. & Barnes, R.D. 2004. Invertebrate Zoology. Seventh Edition. Thomson, Brooks/Cole.: vii-xvii, 1-963, I1-I26.

Nexus externi 

 Calcarea apud Universitatem Berkeleiensem
 Calcarea apud Animaldiversityweb

Porifera
Taxa Bowerbank
Taxa 1864