Morphological Evidence of Coherent Organic Material within the Stereom of Postmetamorphic Echinoderms

  • P. Dubois


The occurrence of a coherent organic material within the mineral phase (i.e. the stereom) of the skeleton of postmetamorphic echinoderms is demonstrated in both light and scanning electron microscopies. This material is structured in concentric laminae bridged by radial threads. IC most probably introduces extensive discontinuities in the crystalline network of the high-magnesium calcite which forms the skeleton. Consequently, echinoderm ossicles should presumably be true polycrystalline aggregates.

Key words

Skeleton Echinoderms Organic matrix Crystallography 


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Copyright information

© Springer-Verlag Tokyo 1991

Authors and Affiliations

  • P. Dubois
    • 1
  1. 1.Laboratoire de Biologie marine (CP 160)Université Libre de BruxellesBruxellesBelgium

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