Two Distinct Populations of Collagen Fibrils in A “Sclerosponge” (Porifera)

  • Jean Vacelet
  • Robert Garrone
Part of the NATO ASI Series book series (NSSA, volume 93)


An assemblage of “Coralline sponges” has been discovered recently in the Phylum Porifera. These sponges contain, in addition to their discrete calcareous or siliceous spicules, a massive calcareous skeleton which offers some analogies with the skeleton of the mineralized cnidarians. “Coralline sponges” are classified either among several groups of sponges (Vacelet, 1983) or as a new class, the Sclerospongiae (Hartman and Goreau, 1970; Termier and Termier, 1973); they are considered as the survivors of organisms which contributed to reef building during the Mesozoic and Paleozoic Eras. The comparison of the collagen of these “living fossils” with the collagen of modern sponges, as well as with the collagen of other animals could yield interesting data on the evolutionary aspects of this protein and of the Phylum Porifera.


Collagen Fibril Great Barrier Reef Thin Polished Section Acid Fuchsin Intercellular Matrix 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • Jean Vacelet
    • 1
  • Robert Garrone
    • 2
  1. 1.Station Marine d’EndoumeMarseilleFrance
  2. 2.Laboratoire d’HistologieUniversité Claude BernardVilleurbanneFrance

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