30750 - Well Preserved 2.61 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Monte Bolca Fossil Fishes Echinoidea - Euechinoidea - Pseudodiadematidae

Echinoidea - Euechinoidea - Pseudodiadematidae

All of them have glued and tiny filled fractures

Thoral 1946 (trilobite)

it has some filled or glued fractures

The scanning electron microscopy reveals that the chemical composition of the sample is mostly homogenous native iron (Fig

30750 - Well Preserved 2.61 Inch Crotalocephalina (Crotalocephalus) gibbus Lower Devonian Trilobite Monte Bolca Fossil Fishes Echinoidea - Euechinoidea - PseudodiadematidaeCrotalocephalina 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,