Art Monday: Flying Trilobite Tattoo

The design: The tattoo:

Originally posted here, and submitted to Carl Zimmer's Science Tattoo Emporium, where all the kewlest tattoos go. I got it for my birthday in 2008.

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Original artwork on The Flying Trilobite Copyright to Glendon Mellow
under Creative Commons Licence.

Flying Trilobite Gallery
*** Flying Trilobite Reproduction Shop ***

Hint: there's another tattoo design being posted later today!
But who was the design for?