Annelid phylogeny and the status of Sipuncula and Echiura Struck, Torsten H. ; Schult, Nancy ; Kusen, Tiffany ; Hickman, Emily ; Bleidorn, Christoph ; McHugh, Damhnait ; Halanych, Kenneth M. Abstract Publication: BMC Ecology and Evolution Pub Date: December 2007 DOI: 10.1186/1471-2148-7-57 Bibcode: 2007BMCEE...7...57S