Class Demospongiae includes approximately 4,750 species in 10 orders. Their geographic distribution in the marine environment is from the intertidal to the abyssal zone; some species inhabit freshwater.
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Demosponge - Wikipedia, the free encyclopedia
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The Demospongiae are the largest class in the phylum Porifera. Their "skeletons" are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. They contain 90% of al...
en.wikipedia.org/wiki/Demosponge
Description of Demospongiae (sponges). ... Class Demospongiae; (contains 90% of all sponge species, including the most common and familiar forms) ... Range and Habitat...
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2008. Species of the sponge genus Chondrilla (Demospongiae: Chondrosida: Chondrillidae) in Australia. Records of the Western Australian Museum 24 (4): 469-486. ... Lee, W. L. 2001. Four new species of Forcepia (Porifera, Demospongiae, Poecilosclerida, Coelosphaeridae) from California, and synonymy of Wilsa de Laubenfels,
www.palaeos.org/Demospongiae www.palaeos.org/Demospongiae
"Demospongiae" is by far the majority choice. However, there are some who insist on "Demospongia," (e.g., Medina et al., 2001; and Benton & Harper, 1997 -- sometimes) or even "Demospongea" (Benton & Harper, 1997 -- the rest of the time).
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2004. Molecular phylogeny of Demospongiae: implications for classification and scenarios of character evolution. Molecular Phylogenetics and Evolution 32(3):823-837. ... Chombard, C., N. Boury-Esnault, A. Tillier, and J. Vacelet. 1997. Polyphyly of "sclerosponges" (Porifera, Demospongiae) supported by 28S ribosomal sequences.
tolweb.org/Demospongiae/20439 tolweb.org/Demospongiae/20439
Reference for: Demospongiae ... Notes: Published in two volumes: Volume 1 - Introductions and Demospongiae; Volume 2 - Calcarea, Hexactinellida, Sphinctozoa, Archaeocyatha, unrecognizable taxa, and Index of higher taxa...
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1994. Phylogeny and classification of lithistid sponges (Porifera: Demospongiae): a preliminary assessment using ribosomal DNA sequence comparisons. Molecular Marine Biology and Biotechnology, 3(2): 87-103. Reitner, J. and D. Mehl.
www.ucmp.berkeley.edu/porifera/demospongia.html
Class: Demospongiae ... The demosponges originated in the Cambrian period and form the largest class of the phylum Porifera, containing about 85% of all described Holocene species. The class Demospongiae is divided into three subclasses:
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The Demospongiae vary in size from small, encrusting forms to very large, irregular masses. All are leuconoid; many are brightly colored. The freshwater sponges (family Spongillidae) belong to this class; they are frequently green because of symbiotic algae that live in the amoebocytes.
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