Journal of Paleontology, Vol. 78, No. 5 (Sep., 2004), pp. 920-940 (21 pages) Cambrian ptychopariids have defied most attempts at higher classification. Even at the generic level, there is no consensus ...

Eleven species of trilobites from the Pleasant Hill Limestone in Blair and Huntingdon Counties are described and illustrated. A new genus, Blairella (type species: B. crassimarginata Rasetti, n. sp.) ...

Fossils can tell scientists a lot about an animal such as their morphology, their environment, and where to place them in the tree of life. One thing though that’s very difficult to observe in the ...

Thanks to being rapidly entombed in volcanic ash – in a “Pompeii-like” process – Cambrian-age trilobites’ anatomy is more discernable than ever, via exquisitely preserved fossils. The fossils ...

The “king” of the trilobites was snacking on whatever it could eat some 514 million years ago in the Cambrian era, even shelled creatures of its own species. By Rebecca Dzombak Cannibalism is common ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. About 465 million years ago, a now extinct arthropod called a ...

The discovery of clasper limbs in a fossil suggests that some species of the ancient arthropods reproduced much like modern horseshoe crabs. By Jack Tamisiea The sturdy, calcite-infused exoskeletons ...

In the surreal scientific illustrations of Glendon Mellow, human bodies merge with those of our ancient ancestors – like trilobites and dimetrodons. The ancient Cretaceous oceans glow with a strange ...

The great, car-sized predatory "shrimp" that was master of Earth's seas a half billion years ago may have been unable to eat anything harder than baby food. Several lines of evidence along with a new ...

Cannibalism is common among the millions of modern arthropod species. A praying mantis consumes her mate after copulation, termites suck blood out of wounded peers, and mosquitoes snack on larvae. But ...