Harpetids and trinucleids are two different types of trilobite. They both shared an unusual body plan, with a wide, flat brim extending from the head. Scientists once thought this must mean they were ...

In the event, no others were published. As the first monographic treatment of Carboniferous trilobites from Britain and Ireland, it has remained a standard work. Thirty-one species distributed among ...

Trilobites provide an unparalleled sample set for understanding evolutionary patterns in Palaeozoic marine rocks. There are more than 20,000 known species. Our current research projects include: ...