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Clavelina lepadiformis (Müller, 1776)

Light bulb ascidian

Clavelina lepadiformis

Illes Medes, Spain, 7 meters, 2011, WBN

Clavelina lepadiformis

Ria d’Etel, France, 8 meters, 2011, WBN

Clavelina lepadiformis

Illes Medes, Spain, 12 meters, 2011, WBN

Description

Clavelina lepadiformis is a colonial ascidian living in groups of 3 to 3OO zooids. They are elongated, cylindrical and up to 2 cm tall. The test is smooth and completely transparent so that the branchial sac is clearly visible. The endostyle, the dorsal axis, the margin of the oral and atrial siphons as well as the upper part of the pharynx are underlined by a thin white or yellowish line. The zooids are joined together by a short basal stolon that cling on rocks, seaweeds or piles.

Distribution

Clavelina lepadiformis is found from surface to 50 m deep in the Atlantic Ocean, the North Sea, the English Channel and in the Mediterranean Sea.

Image satellite: © Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.

Données de distribution : Clavelina lepadiformis (Müller, 1776) in GBIF Secretariat (2019). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2020-09-25.

Classification

Source : World Register of Marine Species


Biota (Superdomain)
Animalia (Kingdom)
Chordata (Phylum)
Tunicata (Subphylum)
Ascidiacea (Class)
Aplousobranchia (Order)
Clavelinidae (Family)
Clavelina (Genus)
Clavelina lepadiformis (Species)

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.

Endostyle : groove through which food particles are moved up to the oesophagus.

Stolon : root-like element binding together the individuals of a colony.

Authors

Text : Anne Bay-Nouailhat © 2005 - 2020.

Photos : © Wilfried Bay-Nouailhat. Published with his kind permission.
Websites and reference works : Consult bibliography

Image satellite: © Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community.

Données de distribution : Clavelina lepadiformis (Müller, 1776) in GBIF Secretariat (2019). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2020-09-25.

How to cite this page

Bay-Nouailhat A., September 2005, Description of Clavelina lepadiformis, [On line] http://european-marine-life.org/32/clavelina-lepadiformis.php, consulted on 2020 September 25.

Author

Photographie de Anne Bay-Nouailhat

Anne Bay-Nouailhat

Project manager in marine environment
Professional diver - Naturalist

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