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Lepidocyclus

Tetradium

By Tetradium

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Lepidocyclus -  Decorah Formation only? For me I hadn't found it in Platteville formation for unknown reason - could be locations. Very abundant and highly variable in forms - I suspects quite a few genus and species can be easily mistaken for this one. Part of it is I only find the smallest ones as strongly triangular and more flat with sulcus not as prominent. But all the bigger one are much more inflated. Plus costae is pretty uniform over all species. Transverse growths are sometimes prominent on anterior portion of the shell, usually on adult specimens.

From the album:

Brachiopods of Platteville/Decorah Twin Cities Minnesota

· 48 images
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  • 8 image comments

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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