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Keywords:

  • Algae;
  • early Serpukhovian;
  • Guadiato area;
  • Mississippian;
  • palaeobiology;
  • palaeoecology;
  • SW Spain

Well-preserved specimens of Calcifolium ? punctatum Maslov from the Guadiato area (Spain) show a great adaptability to environmental modifications. Six morphotypes are recognized: flabellum-shaped cups, massive erect cups, stockade cups, crustose growth, petals and inter-cup segments. These morphologies are an adaptative response to fluctuation of the following factors: substratum, light/turbidity/depth, competition for space, influx of micrite/rate of sedimentation, hydrodynamic energy and bioturbation.