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Cyrtospirifer whitneyi

Tetradium

By Tetradium

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Cyrtospirifer whitneyi - the most variable in shapes of all the brachiopod species at Lime Creek Formation. No one knows why its so variable as the only thing close to it is oysters, jewelboxes and such but they lives on hard substrates not on stalks on muddy bottom like spirifer brachiopods. One half may be nearly flat, or greatly inflated. Wings can be so extreme that it look more rectangular or may be absent. Sulcus may be greatly reduced in juvenile forms. Ribs can vary from fine to coarse.

From the album:

Lime Creek Devonian Rockford Iowa

· 37 images
  • 37 images

Photo Information

  • Taken with EASTMAN KODAK COMPANY KODAK DX7590 ZOOM DIGITAL CAMERA
  • Focal Length 6.3 mm
  • Exposure Time 1/30
  • f Aperture f/2.8
  • ISO Speed 140
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