phylum ctenophora n.
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Phylum Ctenophora

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Phylum Ctenophora

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  1. Phylum Ctenophora Comb Jellies Phylulm Ctenophora

  2. Phylum Ctenophora (Comb Bearers) • Defining Characteristics • Plates of fused cilia arranged in rows • Adhesive prey capturing cells (colloblasts) • Comb jellies are delicate, transparent, non-stinging predators Phylulm Ctenophora

  3. Ctenophora Structure • Similar in structure to Cnidaria medusa • Poorly studied due to fragile nature Phylulm Ctenophora

  4. Ctenophore Structure • Body surface has eight rows of comb-like paddles • Comb paddle has thousands of cilia used to swim Phylulm Ctenophora

  5. Apical Sense Organ • Apical sense organ located on the aboral surface controls beating of cilia • Statolith and balancers Phylulm Ctenophora

  6. Colloblasts • Sticky retractile tentacle used to catch prey • Colloblast discharge an adhesive thread which is sticky to the touch • Some spp. lack tentacles and the body is studded with colloblasts Phylulm Ctenophora

  7. Digestion • Feed on plankton, other ctenophores and other Cnidarian jellies • Gut extends through the entire body; mouth is at the oral end • Anal pore is at the aboral end Phylulm Ctenophora

  8. Reproduction • Can rapidly regenerate lost or damaged parts • Usually hermaphrodites • Developmental stage • Cydippid larva, this develops into an adult Phylulm Ctenophora

  9. Evolutionary history and Bioluminescence Phylulm Ctenophora

  10. Evolutionary History Phylulm Ctenophora

  11. Ctenophore diversity • Most species live in the open ocean and are not well studied • New studies use submersibles and divers to collect specimens, eliminating specimen destruction by fast towed nets • Phylum Ctenophora • Order Lobata • Order Beroida Phylulm Ctenophora

  12. Order Lobata • Order Lobata • Posses long tentacles throughout the lifecycle • Retractile in nature Phylulm Ctenophora

  13. Order Beroida • Order Beroida • Lack tentacles, or oral lobes • Can consume prey substantially larger than itself Phylulm Ctenophora