Dalmanites limulurus Trilobite

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The Dalmanites trilobite lived in the ocean during the Silurian period between 450 - 415 million years ago.

Dalmanites used its "shizochroal eye" to get a remarkably clear look at its undersea world. The unique eye was made of hundreds of relatively large, thick lenses that were made of the mineral, calcite. The periscope-esque eyes allowed for a wide range of view.

This particular specimen clearly shows the eye facets and armor that kept it protected. The specimen has been retouched with a dark gray color to help it stand out clearly from the shale.

Type: Trilobite
Species: Dalmanites limulurus
Age: Silurian (443 - 416 million years old)
Formation: Rochester shale
Locality: Middleport, New York

Size of Plate: 3.63 x 3.13 x .5 inches
Size of Specimen: 2.31 x 1.5 inches
Weight: 7.6 oz.

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