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Conference of the Arabian Journal of Geosciences

CAJG 2018: Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas pp 29–31Cite as

Morphological variability of Polyconites hadriani (Hippuritida, Bivalvia) in the Aptian carbonate platforms of the western Maestrat Basin, eastern Iberia

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Abstract

This investigation is aimed to study the morphological variability of the polyconitid rudist, Polyconites hadriani, from the Aptian carbonate platforms of the western Maestrat Basin, in Iberia. The individuals of the platform top to upper slope carbonates differ from those of the slope deposits in the size and external shape of the shell. Therefore, the populations of these two distinct platform habitats were compared by morphometric measures (dorso-ventral commissural diameter and antero-posterior commissural diameter). The results of the morphometric analysis showed that shell size and shell form were correlated with depth. (1) Larger shells occur in the slope deposits while smaller shells in the shallower platform top to upper slope settings; (2) commissural outline is compressed dorso-ventrally in the individuals from the platform top to upper slope environments and in half the individuals from the slopes, whereas the commissural outline is compressed antero-posteriorly in the other half of the slope group. It is suggested that phenotypic plasticity allowed P. hadriani to adapt shell growth to the different ecological conditions prevailing in the two habitats.

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References

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Author information

Authors and Affiliations

  1. Universitat Autònoma de Barcelona, 08193, Bellaterra (Cerdanyola del Vallès), Spain

    Eulàlia Gili

  2. Institute of Earth Sciences Jaume Almera, ICTJA-CSIC, 08028, Barcelona, Spain

    Enric Pascual-Cebrian

  3. The Open University, Milton Keyness, MK7 6AA, UK

    Peter W. Skelton

  4. Universitat de Barcelona, 08028, Barcelona, Spain

    Telm Bover-Arnal

Authors
  1. Eulàlia Gili
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  2. Enric Pascual-Cebrian
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  3. Peter W. Skelton
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  4. Telm Bover-Arnal
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Corresponding author

Correspondence to Eulàlia Gili .

Editor information

Editors and Affiliations

  1. Faculty of Sciences of Bizerte, University of Carthage, Amilcar, Tunisia

    Mabrouk Boughdiri

  2. Earth Science Department, University of Zaragoza, Zaragoza, Spain

    Beatriz Bádenas

  3. University of Kansas, Lawrence, KS, USA

    Paul Selden

  4. University of Grenoble Alpes, Grenoble, France

    Etienne Jaillard

  5. Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany

    Peter Bengtson

  6. University of Bretagne Occidentale, Brest, France

    Bruno R.C. Granier

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Gili, E., Pascual-Cebrian, E., Skelton, P.W., Bover-Arnal, T. (2019). Morphological variability of Polyconites hadriani (Hippuritida, Bivalvia) in the Aptian carbonate platforms of the western Maestrat Basin, eastern Iberia. In: Boughdiri, M., Bádenas, B., Selden, P., Jaillard, E., Bengtson, P., Granier, B. (eds) Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas. CAJG 2018. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-01452-0_7

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