Who were the earliest ancestors of scorpions, spiders and horseshoe crabs? A Ph.D. student from the University of Lausanne (Switzerland), with the support of a CNRS researcher, has identified a fossil ...

Everyone has come across a chelicerate. This diverse group of arthropods contains more than 120,000 known species, including spiders, scorpions, mites and horseshoe crabs. Each of these critters is ...

A tiny fossil of a sea creature that lived more than half a billion years ago sheds new light on the evolution of arthropods, the most species-rich and successful group of animals to inhabit Earth, ...

It looked, at first, like the sort of fossil Rudy Lerosey-Aubril knew well. After a long day of teaching, the Harvard ...

A 500-million-year-old fossil of a very early relative of spiders, scorpions, and mites offers insights into how this group of arthropods, called chelicerates, evolved. The fossil, found in Utah, USA, ...

Learn how a fossil from Utah’s Wheeler Formation reveals where early spider relatives lived, how quickly complex animal body plans emerged after the Cambrian Explosion, and why those traits took ...

One of several Jianfengia fossil specimens: The animal's body plan is extremely simple, consisting of numerous identical segments. However, its head is like that of a more modern crustacean, with eyes ...