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Ceratoporella nicholsoni, cut specimen from Pedro Bank, Caribbean Sea, about 15 cm wide. Brown sponge tissue covers white massive aragonite skeleton.

Sclerosponges are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite. Because of their long life span (500-1,000 years) it is thought that analysis of the aragonite skeletons of these sponges could extend data regarding ocean temperature, salinity, and other variables farther into the past than has been previously possible. Their dense skeletons are deposited in an organized chronological manner, in concentric layers or bands. The layered skeletons look similar to reef corals. Therefore sclerosponges are also called coralline sponges.

Sclerosponges were first proposed as a class of sponges, Sclerospongiae, in 1970 by Hartman and Goreau.[1] However, it was later found by Vacelet that sclerosponges occur in different classes of Porifera.[2] That means that sclerosponges are not a closely related (taxonomic) group of sponges. Like bats and birds that independently developed the ability to fly, different sponges developed the ability to build a calcareous skeleton independently and during different times in Earth history. Fossil sclerosponges are already known from the Cambrian period.[3]

Sclerosponges include the species Ceratoporella nicholsoni, Stromatospongia vermicola, Hispidopetra miniana, S. norae, Goreauiella auriculatra, and Merlia sp., which were described in detail by Lang et al. in 1975.[4]

References

  1. ^ W. D. Hartman and T. F. Goreau (1970). "Jamaican coralline sponges: Their morphology, ecology and fossil relatives". Symp. Zool. Soc. Lond. 25: 205–243.   (Cited by [1].)
  2. ^ J. Vacelet (1985). "Coralline sponges and the evolution of the Porifera". System. Assoc. Spec. 28: 1–13.  
  3. ^ J. Reitner (1992). "Coralline Spongien. Der Versuch einer phylogenetisch-taxonomischen Analyse". Berliner Geowissenschaftliche Abhandlungen Reihe E (Paläobiologie) 1: 1–352.  
  4. ^ J. C. Lang, W. D. Hartman and L. S. Land (1975). "Sclerosponges: Primary framework constructors on the Jamaican fore-reef". Mar. Res. 33: 223–231.   (Cited by [2].)

External references

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Wikispecies

Up to date as of January 23, 2010

From Wikispecies

Taxonavigation

Main Page
Cladus: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Parazoa
Phylum: Porifera
Classis: Sclerospongiae
Ordo: Ceratoporellida - Merliida - Stromatoporoida - Tabulospongida

Vernaculer names

Ελληνικά: Σκληρόσπογγοι
Svenska: Korallsvampar

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