Two 325-million-year-old ctenacanth shark fossils discovered in Mammoth Cave shed light on ancient marine ecosystems.

A recent study shows that marine oxygen levels were crucial to the evolution of early Paleozoic trilobite body size ... many of these studies are based on fossil vertebrates.

A new study finds that a trilobite species with exceptionally well-preserved fossils from upstate New York has an additional set of legs underneath its head. The research, led by the American ...

The pressures of sediment layers often flatten delicate fossils. But after the eruption buried the trilobites, cool seawater mixed with the hot ash and quickly hardened the pyroclastic flow into ...

Pristine trilobite fossils have been unexpectedly found preserved by volcanic ash in Morocco. Palaeontologists previously thought fossils could not occur in volcanic rock. The palaeontology world ...

Scientists have uncovered intricately preserved fossils of trilobites that are providing new insights into the extinct invertebrates’ anatomy. The animals had been buried in modern-day Morocco ...

Trilobites were very abundant marine arthropods, protected by calcified exoskeletons that easily fossilized. For these reasons, the animals are very well represented in the fossil record.

A group of researchers has discovered the best-preserved three-dimensional trilobite fossils ever found, shedding new light on these ancient marine inhabitants. The fossils, which date back more than ...

Some of the best three-dimensionally preserved fossil trilobites have been revealed from Morocco. The ancient arthropods were caught in the pyroclastic flow of a volcanic eruption that smothered the ...