2011. Tsagkogeorga, Georgia, Turon, Xavier, Hopcroft, Russell R., Tilak, Marie-Ka, Feldstein, Tamar, Shenkar, Noa, Loya, Yossi, Huchon, Dorothée, Douzery, Emmanuel J. P., and Delsuc, Frédéric. BACKGROUND: Tunicates have been recently revealed to be the closest living relatives of vertebrates. Yet, with more than 2500 described species, de... BMC Evolutionary Biology. French National Centre for Scientific Research, Spanish National Research Council, University of Alaska Fairbanks, and Tel Aviv University.