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Stolonica socialis

Stolonica socialis

Orange sea-squirt

   Stolonica socialis is a colonial ascidian of 2 cm high. Up to 300 zooids can be closely connected through a basal stolon to compose a colony. Zooids are ovoid, the test is smooth and its color may vary from brown to yellow-orange. Siphons are terminal, prominent and small, the oral one being slightly larger than the atrial one.
The colony is attached to rocks between 5 to 35 meters deep. It is found in the Atlantic Ocean from the British coasts to Brittany and in the English Channel.

Classification

 (source : European Register of Marine Species)

  • Chordata [Phylum]
  • Tunicata [Subphylum]
  • Ascidiacea [Class]
  • Stolidobranchia [Suborder]
  • styelidae [Family]
  • Stolonica socialis (Hartmeyer, 1903)

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.

Stolonica socialis. Stolonica socialis

Stolonica socialis. Stolonica socialis
Close-up view.

 

Authors


Top photograph :
© Wilfried Bay-Nouailhat. Published with author's kind permission : 
Stolonica socialis, Iles Glénan, South Brittany, West of France. Depth 9 meters.
Bottom photographs : © Wilfried Bay-Nouailhat. Published with author's kind permission : 
Stolonica socialis, . Anse de Camaret, North Brittany, West of France. Depth 10 meters.
© Wilfried Bay-Nouailhat. Published with author's kind permission : 
Stolonica socialis, Close-up view.. Anse de Camaret, West-Brittany, West of France. Depth 20 meters.
Text :  Anne Bay-Nouailhat © 2005-2017.
Translation :  Anne Bay-Nouailhat © 2007-2017.

How to cite this page in publications


Bay-Nouailhat A., January 2005, Description of Stolonica socialis, Available on line at http://www.european-marine-life.org/32/stolonica-socialis.php, consulted on 22 February 2017.
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