Due to their hard, calcified exoskeleton often being well-preserved in the fossil record, trilobites are some of the best ...

A recent study shows that marine oxygen levels were crucial to the evolution of Early Paleozoic trilobite body size, ...

This has preserved a detailed record of trilobite diversity. In many cases, enough fossils have been found to track changes in a type of trilobite over millions of years. The detailed fossil record of ...

The trilobite, an extinct marine ... Studying the fossils of Skehanos and cousins left behind in the undersea mud that formed New England's rock ribs adds to knowledge of the geologic record of North ...

Currently, the state fossil is the Phacops rana, a type of Trilobite. "It's a bottom feeding Arthropod—which is a bug, and it's very common, found in multiple geological layers," said Mason.

The Pennsylvania State fossil is currently a type of trilobite called Phacops rana. Phacops rana is a marine arthropod from the Paleozoic era. According to the Commonwealth of Pennsylvania ...

This insight enabled him to use trilobites and other fossils to constrain the position of the continents throughout time. He has died, aged 79. Fortey was born in Ealing in west London and ...