Figure 2From: Seeing chordate evolution through the Cionagenome sequenceA phylogeny of chordate evolution. (a) A phylogenetic tree depicting the likely relationships between chordates and other animals, timing of genome amplifications (solid circles), and origin of novel characteristics. Phyla are in capitals; Porifera includes sponges; Cnidaria includes jellyfish and hydra; Echinodermata includes sea stars and sea urchins and Hemichordata includes marine acorn worms. (b) Genome size (Mb) and (c) estimated gene number of sequenced animal genomes are represented by bars.Back to article page