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.
Stolonica socialis is found in the Atlantic Ocean from the British coasts to Brittany and in the English Channel.
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Source : World Register of Marine Species
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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.
Text : Anne Bay-Nouailhat © 2005 - 2022.
Photos : ©
Wilfried Bay-Nouailhat. Published with his kind permission.
Websites and reference works : Consult bibliography
Bay-Nouailhat A., January 2005, Description of Stolonica socialis, [On line] https://european-marine-life.org/32/stolonica-socialis.php, consulted on 2022 August 15.
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