Bradoriida are geographically widespread, and occur in the fossil record shortly before the earliest trilobite fossils.

He became an expert on trilobite fossils and on wildflowers in the Alps.

A fossil photograph of Olenoides nevadensis This trilobite fossil is about 50 mm.

This trilobite fossil occurs in Russia, Sweden and Norway.

Illinois has a reputation for rocks bearing large numbers of trilobite fossils, often of very high preservational quality.

Trilobites were still present and Ordovician rocks are a better source of trilobite fossils than the state's Cambrian deposits.

During moulting, the exoskeleton generally split between the head and thorax, which is why so many trilobite fossils are missing one or the other.

Drawers are filled with dozens of real artifacts to handle, from a trilobite fossil to an emu egg.

Many of the trilobite fossils found commonly elsewhere in the world are these empty suits of armour.

Dr. Babcock examined more than 300 trilobite fossils, all exhibiting malformations of various kinds.