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Revision of the genus Clathrina (Porifera, Calcarea)
Klautau, M.; Valentine, C. (2003). Revision of the genus Clathrina (Porifera, Calcarea). Zool. J. Linn. Soc. 139(1): 1-62
In: Zoological Journal of the Linnean Society. Academic Press: London. ISSN 0024-4082
Peer reviewed article

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Keywords
    Animal morphology; Cosmopolite species; Sponges; Calcarea [WoRMS]; Clathrina Gray, 1867 [WoRMS]; Porifera [WoRMS]; Marine

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  • Klautau, M.
  • Valentine, C.

Abstract
    The genus Clathrina has one of the most difficult systematic arrangements in the Porifera, Class Calcarea. Few morphological characters can be used to describe its species, and the systematics and the geographical distribution of its species have changed several times, according to the point of view of the systematists. ‘Lumpers’ consider that clathrinas are morphologically plastic, while ‘splitters’ believe that even slight morphological differences should be considered sufficient to distinguish between species. The morphology of several specimens/species of Clathrina, including the type species, when possible, was studied and used to produce the first revision of this genus. Using results obtained from previous morphological and molecular studies, the morphological characters were chosen and analysed in all studied specimens. In total, 43 species were found, nine of which are new to science. These results agree with the viewpoint that morphological characters such as type and distribution of spicules, size of actines, spines, anastomosis of the cormus, organization of the osculum and presence of granules in cells, are useful when establishing the taxonomy of the genus.

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