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Poriferans
The approximately 5,000 living sponge species are classified in the phylum
Porifera
, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges)
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Poriferans
Cnidarians
Platyhelminthes
Nematodes
Annelids
Molluscs
Arthropods
Echinoderms
Fishes
Amphibians
Reptiles
Birds
Mammals
Presentations