Acesta excavata (J C Fabricius, 1779)Limoidea : Limidae
To size: To 200mm. Shell Structure: Thin, robust. Equivalve: Equivalve. Equilateral: Inequilateral. Tumidity: Valves moderately convex. Outline: Oval, slightly extended anterio-laterally; posterior curved with prominent posterior ear; dorsal anterior straight with anterior ear lacking; ventral anterior curved; ventral curved. Dorsal margin straight. Dorsal area wide. Valves not gaping or with a narrow byssus gape.
Sculpture: Up to around 100 radiating narrow riblets, these most prominent on the anterior-ventral area and the posterio-dorsal area. Inner margin weakly crenulated in small shell but crenulations fading with growth. Ligament: In a large triangular resilifer on the cardinal area. Hinge: Hinge plate on either side of resilifer smooth. Pallial Musculature: Posterior adductor and pedal retractor scar close to the mid posterior margin. Periostracum: Thin, obscure. Colour: Opalescent white becoming dirty white.
Distribution & Ecology
Along the Atlantic margin associated with deep water coral reefs but also attached to rock faces in fjords.
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Juveniles & Similar Species
Key Features & Similar Species
Listed are literature citing Acesta excavata (J C Fabricius, 1779). Reference containing the species Type Description is highlighted.
Fabricius J C 1779. Reise nach Norwegen mit Bemerkungen aus der Naturhistorie und Oekonomie Hamburg. 388pp.
Lopez Correa M, Freiwald A; Hall-Spencer J & Taviani M 2005. Distribution and habitats of Acesta excavata (Bivalvia: Limidae) with new data on its shell ultrastructure Erlangen Earth Conference Series. Cold-Water Corals and Ecosystems. Springer Berlin Heidelberg. 173-205.
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