Trilobite cephalon found in the Waldron Shale. Middle Silurian Period was the age this creature lived. It appears to be a
Glyptambon verrucosus? Fossil found in Clark County, Indiana. Fossil is somewhat small with cephalon being approximately 1.75 cm wide.
See
Weeks Trilobites web site for a truly stunning specimen of this species of trilobite!