Class Anthozoa polyp body form ONLY all marine some contain zooxanthellae

Class Anthozoa some are colonial  colonies are formed of individual zooids some are solitary

Class Anthozoa- life cycle Sexual reproduction sperm egg larva

Class Anthozoa- life cycle asexual reproduction fission pedal laceration fission

Class Anthozoa Sea anemones

Class Anthozoa Soft Corals                                                   Sea pen Sea pansy

Class Anthozoa Stony Corals                                                                               

The Corals Make up the largest group of Anthozoa Colonial Secrete skeleton of calcium carbonate Cup shaped Polyp is fixed to this

Theca Sclerosepta

Fungia spp. Disk Corals

Phylum Ctenophora Ch 9

Characteristics of Ctenophora Diploblastic: with ectoderm and entoderm separated by a cellular mesenchyme. Biradial symmetry with the body axis being oral-aboral. Gastrovascular cavity with complete gut (mouth, gut, two anal openings). No type of bodycavity.

Ctenes of comb row

Ctenes of comb row

Comb Jellies Phylum Ctenophora are the larges animals known to rely primarily on cilia for locomotion.

Macrocilia

Life Cycle Gametes fuse in open water. egg sperm Gametes fuse in open water. Hermaphroditic adults release gametes. Pelagic cydippid larva.

Feeding Feed with specialized cells called colloblasts or lasso cells. A few species have cnidocytes.

Colloblasts on ctenophore tentacles

Figure 9.6 page 277 colloblasts

Figure 9.7 page 278 Kelptocnidae

Ph. Ctenophora Cl. Nuda Cl. Tentaculata ctene row Deiopea kaloktenota Pleurobrachia sp. Coeloplana sp. Cestus sp.

Bioluminescence Produce light using photocytes Located in the walls of the digestive system Appears that light is coming from comb rows NOT all produce luminescence

Big Picture The radiate phyla are the first (i.e. basal) Metazoans Most have a dimorphic life cycle Specialized structures the Cnidocytes Some such as corals secrete a calcium carbonate base Ctenophores produce bioluminescence