30711 - Well Preserved 3.37 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Pterocephalia norfordi and collections UNM: Institute of

and collections UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA

Agraulos quadrangularis

Main masses: Beroud

Maryvillia

Subtaxa: Trinucleus seticornis

30711 - Well Preserved 3.37 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Pterocephalia norfordi and collections UNM: Institute ofCrotalocephalina 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, Cheirurinae, Cheirurus, Chiozoon, Contracheirurus,