Annelid phylogeny and the status of Sipuncula and Echiura.Published in:BMC Evolutionary Biology, 2007, v. 7, n. 1, p. N.PAG, doi. 10.1186/1471-2148-7-57By:Struck, Torsten H;Schult, Nancy;Kusen, Tiffany;Hickman, Emily;Bleidorn, Christoph;McHugh, Damhnait;Halanych, Kenneth MPublication type:Article