The spiny trilobite in today's post is Ketternaspis (Leonaspis) williamsoni from Jebel Issoumour, near Alnif, Tafilalet region, Morocco. It is a smaller species and has many spines along the length of the body starting with the genal spines and extending from the pleural lobes all the way to the pygidium. This species also has an occipital spine that extends back from the cephalon over the body but it is missing in this specimen. This is another rough specimen but I am okay with that as long as the price is reasonable. Specimens like these can be useful as examples of techniques used by preparators to replace or enhance features of a specimen. I am not saying this specimen has been faked, but there is some embellishment.
Ketternaspis (Leonaspis) williamsoni comes from the Eifelian stage of the Devonian.