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Densely packed concentrations of sessile barnacles (Cirripedia : Sessilia) from the Early Pliocene of SE Spain
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- Autor/in:
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- Erscheinungsjahr:
- 2008
- Medientyp:
- Text
- Schlagworte:
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- Concavus concavus
- sessile barnacles
- Almeria-Nijar and Carboneras basins
- Early Pliocene
- Spain
- Beschreibung:
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- Sessile barnacle assemblages, dominated by Concavus concavus (Bronn) and Balanus perforatus Bruguière, are very abundant in the Lower Pliocene deposits of the Almería-Níjar and Carboneras basins (southeastern Spain). They occur in shallow-coastal siliciclastic and mixed siliciclastic-carbonate sediments, forming dense concentrations in two contexts: (1) sheltered shallow-marine depressions and (2) the mouth of distributary channels feeding a delta lobe. Extensive colonization took place during periods of quiescence with a high nutrient and food supply inducing the formation of hummocks. Crowding of high morphotypes was presumably triggered by a high larval supply and recruitment rate. The barnacles are exceptionally well preserved, often as in situ clusters, many with opercula, and include a range of ontogenetic stages with some specimens preserving original colouration. Good preservation is probably due to sudden burial without further reworking. © Springer-Verlag 2007.
- Lizenz:
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- info:eu-repo/semantics/closedAccess
- Quellsystem:
- Forschungsinformationssystem der UHH
Interne Metadaten
- Quelldatensatz
- oai:www.edit.fis.uni-hamburg.de:publications/3e2a177b-93ca-47f9-9242-02d6e128c0bd