The Upper Cambrian Trilobite Olenus at Andrarum, Sweden: a Case of Iterative Evolution? Lauridsen, Bodil Wesenberg ; Nielsen, Arne Thorshoj Abstract Publication: Palaeontology Pub Date: September 2005 DOI: 10.1111/j.1475-4983.2005.00499.x Bibcode: 2005Palgy..48.1041L