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Echinoderms and Ascidians

  • F. S. Billett
  • A. E. Wild

Abstract

Although there is no resemblance in form between adult echinoderms and ascidians, we have chosen to link them together in this chapter for three reasons. First it is necessary to emphasize that they both belong to the Deuterostomia. This is a classification of animals which links the echinoderms with the chordates, and is based on the fact that during development, the anus forms at the blastopore (the opening of the archenteron) and the mouth appears as a second, but quite separate, opening By contrast, development in the other invertebrate phyla, the Protostomia, results in the mouth opening in the region of the blastopore.

Keywords

Animal Development Practical Study Oral Surface Artificial Fertilization Aboral Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Berg, W. E. (1967), `Some experimental techniques for eggs and embryos of marine invertebrates’, In Wilt, F. H. and Wessels, W. K. (Eds) Methods in Developmental Biology, pp 766–776. Crowell, New York.Google Scholar
  2. Berrill, N. J. (1950), The Tunicata, Ray Society, London.Google Scholar
  3. Eales, N. B. (1967), The Littoral Fauna of the British Isles, ( Fourth Edition ), University Press, Cambridge.Google Scholar
  4. Giudice, G. (1973), Developmental Biology of the Sea Urchin, Academic Press, New York and London.Google Scholar
  5. Millar, R. H. (1952),‘Annual growth and reproductive cycles in four Ascidians’, J. Mar. Biol. Ass. U.K., 31, 41–61.Google Scholar
  6. Millar, R. H. (1954), ‘The annual growth and reproductive cycle of the Ascidian Dendrodoa grossularia (Styellidae)’, J. mar. biol. Ass. U.K., 33, 33–48.Google Scholar
  7. Millar, R. H. (1970), British Ascidians, Linnean Society of London, Academic Press, London and New York.Google Scholar
  8. Reverberi, G. (1971), ‘Ascidians’. In G. Reverberi (Ed.) Experimental Embryology of Marine and Fresh Water Invertebrates, pp 188–214. North Holland Publishing Company.Google Scholar
  9. Tyler, A. and Tyler, B. S. (1966), ‘Physiology of fertilization and early development’, In Boolootian R. A. (Ed) Physiology of Echinodermata, Interscience Publishers, London and New York.Google Scholar

Copyright information

© F. S. Billett and A. E. Wild 1975

Authors and Affiliations

  • F. S. Billett
    • 1
  • A. E. Wild
    • 1
  1. 1.Department of BiologyUniversity of SouthamptonUK

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