A cast of the calyx of a Crinoid. These tropical shallow sea invertebrates proliferated in the Carboniferous Oceans 320 million years ago.
A cast of the calyx of a Crinoid. These tropical shallow sea invertebrates proliferated in the Carboniferous Oceans 320 million years ago. The main body with feeding arms sat on top of a segmented stem, which is often all that remains.
Size: 6000px × 4130px
Location: Iowa, USA
Photo credit: © Nick Greaves / Alamy / Afripics
License: Licensed
Model Released: No
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