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Julio Aguirre, Jose Martin, Juan Braga, Christian Betzler, Bjoern Berning and John Buckeridge (2008)

Densely packed concentrations of sessile barnacles (Cirripedia : Sessilia) from the Early Pliocene of SE Spain

Facies, 54(2):193-206.

Sessile barnacle assemblages, dominated by Concavus concavus (Bronn) and Balanus perforatus Bruguiere, are very abundant in the Lower Pliocene deposits of the Almeria-Nijar 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.

semibalanus-balanoides l., natural-populations, neogene-recent uplift, Concavus concavus, Early Pliocene, competitive-exclusion, ancient rocky shores, sessile barnacles, balanus balanoides, carboneras basin, Almeria-Nijar and Carboneras basins, new-south-wales, chamaesipho-tasmanica foster, gregarious intertidal barnacle, Spain
WOS:000254958600004
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