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An updated 18S rRNA phylogeny of tunicates based on mixture and secondary structure models |
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| Authors: | Georgia Tsagkogeorga Xavier Turon Russell R Hopcroft Marie-Ka Tilak Tamar Feldstein Noa Shenkar Yossi Loya Dorothée Huchon Emmanuel JP Douzery Frédéric Delsuc |
| Institution: | 1. Institut des Sciences de l'Evolution (UMR 5554), CC064, Université Montpellier 2, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France 2. Institut des Sciences de l'Evolution (UMR 5554), CNRS, CC064, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France 3. Centre d'Estudis Avan?ats de Blanes (CEAB, CSIC), Accés Cala S. Francesc 14, 17300, Blanes, Girona, Spain 4. Institute of Marine Science, University of Alaska Fairbanks, Fairbanks, Alaska, USA 5. Department of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel 6. Department of Biology, University of Washington, Seattle, WA, 98195, USA |
| Abstract: | BackgroundTunicates have been recently revealed to be the closest living relatives of vertebrates. Yet, with more than 2500 described species, details of their evolutionary history are still obscure. From a molecular point of view, tunicate phylogenetic relationships have been mostly studied based on analyses of 18S rRNA sequences, which indicate several major clades at odds with the traditional class-level arrangements. Nonetheless, substantial uncertainty remains about the phylogenetic relationships and taxonomic status of key groups such as the Aplousobranchia, Appendicularia, and Thaliacea. |
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