30230 - Beautiful 2.86 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Megalodon The term is also used

The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite

The leading side (front) and sides often have flow-lines in the surface which indicates the direction the material was being ablated

Thomas Joyce & Gary L

Asaphus raniceps Dalman

30230 - Beautiful 2.86 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Megalodon The term is also usedNice and well prepared specimen. 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, Cheirurinae, Cheirurus,