skull and jaw
• Cretaceous of Bolivia (1)
In this case the lateral serrations have not been preserved
Precious natural association of 4 Prognathodon teeth with a bony fragment that appears to be mandibular
2003: 397-408
07606 - Beautiful 3.11 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Shark vertebrae skull and jawNice 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,