Lieberman and G
Rooted incisor specimen in its natural jaw bone
Precious natural association of 4 Prognathodon teeth with a bony fragment that appears to be mandibular
skull and jaw
07606 - Beautiful 3.11 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Shark vertebrae Lieberman and GNice and well prepared specimen. It has tiny glued fractures. Crotalocephalina sp, Pibyl and Vanek 1964 (trilobite) Trilobita Phacopida Cheiruridae Parent taxon: Cheiruridae according to P. A. Jell and J. M. Adrain 2002 See also Sepkoski 2002 Sister taxa: Acanthoparyphinae, Anasobella, Ancyginaspis, Arcticeraurinella, Areia, Areiaspis, Borealaspis, Bornholmaspis, Ceraurinium, Ceraurinus, Cerauroides, Cerauromeros, Cerauropeltis, Ceraurus, Chacomurus,