Sep 16, 2019
Scientists Discover Oldest Ancestor of Spider, Scorpion
An international joint research found a new species called Mollisonia plenovenatrix, which is believed to be the oldest chelicerate. The discovery places the origin of chelicerate, a vast group of arthropods with over 115,000 species, including horseshoe crabs, scorpions and spiders, to a time more than 500 million years ago.