Distribution and habitats of Acesta excavata (Bivalvia: Limidae) with new data on its shell ultrastructure

Article in Edited Volumes
(Original article)


Publication Details

Author(s): López Correa M, Taviani M, Freiwald A, Hall-Spencer J
Editor(s): Freiwald A., Roberts JM-
Title edited volumes: Cold-water Corals and Ecosystems
Publisher: Springer
Publishing place: Berlin, Heidelberg
Publication year: 2005
Pages range: 173-205
Language: English


Abstract


Acesta excavata is the largest known bivalve associated with the Lophelia pertusa communities along the northeast Atlantic continental margin, but has also been found along steep cliffs, devoid of bathyal corals, and on more subdued topographies. During the Pleistocene, including the last glacial, A. excavata was widespread in the Mediterranean, but is in the Recent fauna known only from four Mediterranean sites. A new possible live-record from the Canyon du Var off Nice is presented. Radiocarbon dating (AMS 14C-method) on an A. excavata assemblage from the Strait of Sicily yielded a Late Pleistocene age of 39.9 ka. Biometric parameters indicate that Pleistocene Mediterranean shells achieved about the same maximum sizes as their Recent Atlantic counterparts, but individuals have been slightly smaller on average. The subspecies Acesta excavata sublaevis Nordsieck, based on a subfossil juvenile Mediterranean shell, is not considered a valid taxon. Mineralogical composition and ultrastructure of A. excavata have been analyzed using thin-sections, Feigel staining, x-ray diffractometry (XRD) and SEM-imaging. Its wide distribution, large size (15 cm) and simple shell architecture makes it a prime candidate for palaeoenvironmental studies in cold-water coral settings.



FAU Authors / FAU Editors

López Correa, Matthias
Lehrstuhl für Paläoumwelt


How to cite

APA:
López Correa, M., Taviani, M., Freiwald, A., & Hall-Spencer, J. (2005). Distribution and habitats of Acesta excavata (Bivalvia: Limidae) with new data on its shell ultrastructure. In Freiwald A., Roberts JM- (Eds.), Cold-water Corals and Ecosystems. (pp. 173-205). Berlin, Heidelberg: Springer.

MLA:
López Correa, Matthias, et al. "Distribution and habitats of Acesta excavata (Bivalvia: Limidae) with new data on its shell ultrastructure." Cold-water Corals and Ecosystems. Ed. Freiwald A., Roberts JM-, Berlin, Heidelberg: Springer, 2005. 173-205.

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Last updated on 2019-18-07 at 07:18