Penis worm's ancient cousin fossilized with its doughnut-shaped brain intact
When you buy through links on our site , we may bring in an affiliate delegation . Here ’s how it works . Scientists uncovered something unexpected in the fossilized conceptus of a worm - corresponding tool from the Welsh geological period : the remains of a tiny , donut - shape brain in the primordial animal ’s top dog . The close to 500 million - year - old fossil is an example of the leatherneck speciesMarkuelia hunanensis , an ancientcousinofpenis worms(priapulids ) and clay dragons ( Kinorhyncha ) ....