World Porifera Database

Phylum Porifera - Biology 2e porifera

SpongesSponges are considered the oldest animal group They are multicellular but don't have tissues or organsThe name porifera means 'pore bearer' in Latin

porifera Porifera contain the sponges: the most ancient of all animal groups They originated in the Cambrian period around 600 million years ago  The Porifera are said to contain the greatest variety of sterols found in any invertebrate phylum In most sponges the predominant sterols have a Δ5,7 1 Phylum Porifera 2 Phylun Coelenterata 3 Platyhelminthes 4 Nematoda 5 Phylum Annelida 6 Phylum Mollusca

ออปโปa17 Citation: Rützler, Klaus 1986 Phylum Porifera in Marine Fauna and Flora of Bermuda: A Systematic Guide to the Identification of Organisms, edited