30670 - Well Preserved 3.36 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Prionocheilus A preparation like this without

A preparation like this without small restorations is impossible

vesicular masses

Coosella intermediens

• Ordovician to Silurian of Canada (Québec)

anorthite: An99

30670 - Well Preserved 3.36 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Prionocheilus A preparation like this withoutCrotalocephalina 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,