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Tetragramma variolare (BROGNIART, 1822) aboral ambulacral zone view


ricardo

Tetragramma variolare (BROGNIART, 1822) , specimen over matrix, aboral view with ambulacral zone detail, Calcários Apinhoados da Costa D'Arnes formation, Upper Cenomanian, Portugal.

40 mm.

From the album:

Echinoidea from Calcários Apinhoados da Costa D'Arnes formation

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Photo Information

  • Taken with Canon Canon EOS 550D
  • Focal Length 50 mm
  • Exposure Time 1/10
  • f Aperture f/11.0
  • ISO Speed 400

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