"In chelicerates, these 'great appendages' shrunk, so they eventually became the spider fangs," Strausfeld said. "In mandibulates, evolution modified them into segmented antennules." According to ...

It had been a long day of teaching for Rudy Lerosey-Aubril. As a reward, he returned to cleaning an intriguing Cambrian arthropod fossil he had recently received for review. At first, the specimen ...

Scientists have decoded the sea spider’s genome for the first time, revealing how its strangely shaped body—with organs in its legs and barely any abdomen—may be tied to a missing gene. The detailed ...

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 ...

Researchers argue that a newly examined specimen found decades ago in Utah provides new clues to the ancestors of chelicerates before the group hit it big on land. By Jack Tamisiea Everyone has come ...

What started as routine fossil cleaning turned into a major scientific surprise when researchers uncovered a tiny claw in a 500-million-year-old specimen where no claw should exist. That detail ...

An international collaboration featuring the University of Vienna and the University of Wisconsin-Madison (USA) has led to the first-ever chromosome-level genome assembly of a sea spider (Pycnogonum ...