520-Million-Year-Old Fossil Sheds Light on Origin of Gills in Arthropods

Erratus sperare, a brand new species of historic marine arthropod from jap Yunnan, China, had distinctive trunk appendages that symbolize an intermediate stage of biramous limb evolution. Erratus sperare lived in what’s now China in the course of the Early Cambrian epoch, some 520 million years in the past. Its fossilized stays have been found on the Chengjiang Fossil Site, a […]