Paleontologists have unearthed the remains of a previously unknown slug-like creature that lived during the Early Ordovician epoch, 478 million years ago. The discovery, reported in the journal Nature, sheds new light on the earliest stages in the evolution of mollusks, a group of invertebrates that includes clams, snails and squids. Calvapilosa kroegeri from the Lower Ordovician epoch (Tremadocian age) Fezouata Formation, near Zagora, Morocco: part,...
