have identified the largest known crab fossil claw ever discovered. In their paper published in the journal New Zealand Journal of Geology and Geophysics, Barry W. M. van Bakel and Àlex Ossó ...

A fossil of a crustacean claw exoskeleton from the Posidonia Shale in Germany. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

For male fiddler crabs, vibrational signals are a crucial part of their courtship routines -- produced by drumming the ground using their oversized claw, or hitting the floor with their shells.