30711 - Well Preserved 3.37 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Pterocephalia norfordi 42 Classifier: A

42 Classifier: A

Mosasaurus Conybeare

Latvia (1)

Trilobita - Asaphida

30711 - Well Preserved 3.37 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Pterocephalia norfordi 42 Classifier: ACrotalocephalina 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,