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Sponge Comparison

Sponge Comparison. Zoology Wakefield 2010-2011. Classes of Phylum Porifera. Class Calcarea possess spicules composed of calcium carbonate with 1, 3, or 4 rays found in shallow waters though 1 species lives @ about 4000 feet mostly marine calcareous spicules.

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Sponge Comparison

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  1. Sponge Comparison Zoology Wakefield 2010-2011

  2. Classes of Phylum Porifera • Class Calcarea • possess spicules composed of calcium carbonate with 1, 3, or 4 rays • found in shallow waters though 1 species lives @ about 4000 feet • mostly marine • calcareous spicules

  3. Classes of Phylum Porifera Class Calcarea

  4. Classes of Phylum Porifera Class Hexactinellida • Glass sponges • 6-rayed siliceous spicules with a fundamentally octagonal symmetry • Exclusively marine • (generally 450 to 900 m, but up to 5000 m)

  5. Classes of Phylum Porifera Class Hexactinellida

  6. Classes of Phylum Porifera Class Demospongia • Siliceous spicules or spongin or both • Most diverse sponge group with 90% of sponges falling into this class • Spongin fibers and/or siliceous spicules with have one to four rays not at right angles

  7. Classes of Phylum Porifera Class Demospongiae

  8. Classes of Phylum Porifera Class Demospongiae

  9. Classes of Phylum Porifera Class Demospongiae

  10. Classes of Phylum Porifera Spicule Formation

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