Researchers compare a homologous opsin gene exon from four related ground beetle species. The number of matching aligned nucleotide sites is reported for each pair: Orchard ground beetle and Valley ground beetle: 59/72 matching aligned sites; Orchard ground beetle and Tundra ground beetle: 91/96 matching aligned sites; Orchard ground beetle and Reef ground beetle: 59/72 matching aligned sites; Valley ground beetle and Tundra ground beetle: 64/72 matching aligned sites; Valley ground beetle and Reef ground beetle: 74/84 matching aligned sites; Tundra ground beetle and Reef ground beetle: 49/60 matching aligned sites. Which pair has the highest percent identity and is predicted to share the most recent common ancestor?