Silurian Odontopleurid Trilobite Odontopleura ovata

This is well preserved specimen of a member of the Order Lichida, Family Odontopleuridae, with dramatically-displayed spines for such a minute taxon, a feature not often preserved intact. This one also has portions of the pustulose exoskeleton preserved. Some examples of this diminutive spiny trilobite have been found in an enrolled state, looking for all the world like a Silurian hedgehog.