Kettneraspis williamsi is an Odontopleurid trilobite (Order: Lichida; Suborder: Lichina; Superfamily: Odontopleurida; Family: Odontopleuridae) from the Lower Devonian strata of Oklahoma. This Lichid sports impressive spines. This specimen is the typical superb quality that comes from the prep lab of Bob Carroll. This example has been meticulously prepared with modern equipment.

There is much variability in the quality of Oklahoma trilobites. Consider this specimen if you want the best (see pix below).