Figure 5

Phylogenetic tree of metazoan opsins including the new opsins from Amphiura filiformis. Representative bilaterian opsin members cluster into six significantly supported groups in both maximum likelihood and Bayesian analysis. Branch support values are indicated next to the branching points and correspond to posterior probabilities and boostrap proportions (in italics). Branch length scale bar indicate relative amount of amino acid changes (Bayesian analysis). A. filiformis opsins are represented in bold (Af). Other echinoderm opsins were included in the analyses: Strongylocentrotus purpuratus (Sp), Strongylocentrotus droebachiensis (Sd), Paracentrotus lividus (Pl), Hemicentrotus pulcherrimus (Hp), Asterias rubens (Ar).