Palaeontology: Tubular worms from the Burgess Shale

    loading  Checking for direct PDF access through Ovid


The discovery, in 500-million-year-old rocks, of fossil acorn worms that lived in tubes illuminates the debate about whether the ancestor of vertebrates was a mobile worm-like animal or a sessile colony dweller. See Letter p.503

Related Topics

    loading  Loading Related Articles