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Suberites ficus
''Suberites ficus'' is a species of sponge in the family Suberitidae. It is sometimes known as the sea orange sponge.
Sponges are primitive animals with little apparent internal organisation. They are composed of a jellylike mesohyl sandwiched between two layers of cells and have a fragile skeleton composed of stiff spicules. They are filter feeders, maintaining a flow of water through their structure which passes out through large openings called oscula.
==Taxonomy==
The name "ficus" was first used by Pallas in 1766 for ''Alcyonium ficus'' but it is unclear exactly which animal he was describing and it is now thought that it may have been an ascidian. Linnaeus in 1767, Esper in 1794 and Lamarck in 1814 also used the name but it was not until Johnston described the spicules as well as the sponge which he named ''Halichondria ficus'' in 1842 that it became clear what sponge was being described. Further research needs to be undertaken to clarify the position.〔(Marine Species Identification Portal )〕 ''Suberites suberia'' was at one time thought to be a synonym but molecular analysis has shown that it is a distinct species. ''Suberites farinaria'' is a similar but encrusting sponge but it is thought to be a juvenile form of ''S. ficus''. Another species, ''Suberites virgultosa'', used to be considered a synonym but is now considered a valid species in its own right.〔 ''Suberites domuncula'' may also be synonymous and further study is required.〔van Soest, R.W.M., Picton, B. & Morrow, C., (2000). Sponges of the North East Atlantic. () Amsterdam: Biodiversity Center of ETI, Multimedia Interactive Software.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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