Sponges (Tetractinomorpha)

The Coelenterata are an obsolete phylum which encompassed sponges and Cnidarians (with ctenophores within Cnidaria).  The  phylum Porifera is now classified as the most basal of the eumatetazoan phyla being derived from the sister taxon to eumetazoans, single celled choanoflagellates.  This wall chart shows representative body forms and spicule shapes of an obsolete order now mainly classified under the Subclass Tetractinomorpha.