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Diplosoma spongiforme

Diplosoma spongiforme

Jelly-synascidian

   Diplosoma spongiforme is an encrusting colonial ascidian which can cover rock surfaces of 20 to 30 cm in diameter. Several colonies can join together and can thus cover a surface of several square meters. Zooids are immersed in a common gelatinous test. Its thickness is irregular, up to 6 mm , giving to its surface an embossed aspect. The oral siphons of the zooids constitute tiny openings densely distributed all other the colony. Several zooids are gathered around a common, broad and slightly prominent atrial siphon, forming a system. Several systems occur in the colony making it resemble a sponge. The jelly-synascidian has a white translucent test with greenish or yellowish mottlings. The margin of the siphons may be white or bluish.
It is present from surface to 40 m deep in the Atlantic Ocean, the English channel, the North Sea and the Mediterranean Sea.

Classification

 (source : European Register of Marine Species)

  • Chordata [Phylum]
  • Tunicata [Subphylum]
  • Ascidiacea [Class]
  • Enterogona [Order]
  • Aplousobranchia [Suborder]
  • Didemnidae [Family]
  • Diplosoma spongiforme (Giard, 1872)

Page glossary


Zooid : Individual, single animal.
Test : or tunic: thick layer secreted by the mantel containing cellulose and protecting the animal.
Oral siphon : Opening by which water is drawn in the ascidian.
Atrial siphon : Opening through which water is expelled.

Diplosoma spongiforme. Diplosoma spongiforme
Colony.

Diplosoma spongiforme. Diplosoma spongiforme
In its habitat.

Diplosoma spongiforme. Diplosoma spongiforme
Detail

Authors


Top photograph :
© Wilfried Bay-Nouailhat. Published with author's kind permission : 
Diplosoma spongiforme, Iles Glénan, South Brittany, West of France. Depth 6 meters.
Bottom photographs : © Wilfried Bay-Nouailhat. Published with author's kind permission : 
Diplosoma spongiforme, Colony.. Iles Glénan, South Brittany, Wet of France. Depth 6 meters.
© Wilfried Bay-Nouailhat. Published with author's kind permission : 
Diplosoma spongiforme, In its habitat.. Anse de Camaret, West-Brittany, West of France. Depth 6 meters.
© Wilfried Bay-Nouailhat. Published with author's kind permission : 
Diplosoma spongiforme, Detail. Iles Glénan, South-Brittany, West of France. Depth 6 meters.
Text :  Anne Bay-Nouailhat © 2005-2017.
Translation :  Anne Bay-Nouailhat © 2007-2017.

How to cite this page in publications


Bay-Nouailhat A., November 2005, Description of Diplosoma spongiforme, Available on line at http://www.european-marine-life.org/32/diplosoma-spongiforme.php, consulted on 25 March 2017.
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