Teleost/tetrapod hybrid characteristics of the Latimeria V1R family. Twenty V1R receptors of Latimeria were compared with V1R and V1R-related ORA receptors of mouse, Xenopus tropicalis, lamprey and 5 teleost fishes (species and color code as given for Figure 1). The phylogenetic tree was generated as described for Figure 1. Branch support is given as percentage. For accession numbers and genomic location of Latimeria and lamprey genes see Additional file 1. Ancestral genes are indicated by open circles at the respective nodes.