Revised clade from Tree of Life for Kingdom Animalia

PHYLUM PORIFERA (sponges; from "Tree of Life" on WWW)

        ===== Calcarea (includes ascon, sycon & leucon types)
        |
        |==== Sclerospongia (coralline sponges; leucon type)
<<======|
        |==== Demospongia (most living sponge species; leucon type)
        |
        ===== Hexactinellida (glass sponges; no regular canal system)

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