Fig. 2From: The phylum Vertebrata: a case for zoological recognitionMolecular phylogeny of deuterostome taxa within the metazoan tree. Echinoderms are shown in orange, hemichordates in magenta, cephalochordates in yellow, urochordates in green, and vertebrates in blue. The maximum-likelihood tree was obtained with a supermatrix of 506,428 amino acid residues gathered from 1564 orthologous genes in 56 species (65.1% occupancy), using a Γ + LG model partitioned for each gene. Plain circles at nodes denote maximum bootstrap support. This tree clearly indicates that Deuterostomia comprises two discrete groups, Ambulacraria and Chordata (from [35])Back to article page