Volume 16, Issue 15, Pages R577-R578 (August 2006) Chaetognath phylogenomics: a protostome with deuterostome-like development  Ferdinand Marlétaz, Elise Martin, Yvan Perez, Daniel Papillon, Xavier Caubit, Christopher J. Lowe, Bob Freeman, Laurent Fasano, Carole Dossat, Patrick Wincker, Jean Weissenbach, Yannick Le Parco  Current Biology  Volume 16, Issue 15, Pages R577-R578 (August 2006) DOI: 10.1016/j.cub.2006.07.016 Copyright © 2006 Elsevier Ltd Terms and Conditions

Figure 1 Chaetognaths as basal protostomes. A rooted maximum likelihood tree based on the analysis of a concatenated 79 proteins and 11,667 positions in a ribosomal protein data set. Bayesian analysis (covarion and non covarion model) also retrieved the same topology. The part of missing positions (missing data) is limited and considered as negligible for the final topology obtained [6]. The sequence evolution model takes into account site rate variation using Γ law (WAG + Γ with four discrete classes). The green line from deuterostomes to chaetognaths indicates the ancestral state of embryological deuterostomy for bilaterians. Support values are give at branches and show maximum likelihood bootstrap (top) and Bayesian posterior probabilities (bottom, italicized). Current Biology 2006 16, R577-R578DOI: (10.1016/j.cub.2006.07.016) Copyright © 2006 Elsevier Ltd Terms and Conditions