From the claws, researchers estimated that its body was roughly 8 feet (2.5 m) long, making it not only the largest potential arachnid, but the largest-ever member of the entire group that ...

The Joro spider, a giant venomous flying arachnid, is coming to the New York area by the end of the year affecting its residents and local ecosystem.

For decades, scientists have known that horseshoe crabs and arachnids, which both belong in the subphylum Chelicerata, are closely related, but it’s been tricky to sort out just how closely related.

A 450-million-year-old fossil of an ancient creature related to the modern-day spider was recovered encased in fool’s gold in upstate New York. The new species is distantly related to arachnids ...

“It is quite unlike any other arachnid known, living or extinct,” co-author Paul Selden, from the University of Kansas and the Natural History Museum of London, said in a May 17 News release.