APPENDIX 2
PHYLOGENETIC TREE OF FAMILY CANIDAE

ONLY GENERIC-LEVEL RELATIONSHIPS ARE SHOWN, followed by the number of species in parentheses. The thick vertical bars indicate the approximate geologic range of each genus. The thin lines indicate proposed phyletic relationships. We follow Wang (1994) for the subfamily Hesperocyoninae; Wang, Tedford, and Taylor (1999) for the subfamily Borophaginae; and Tedford, Wang, and Taylor (1995, in press) and Berta (1988) for the subfamily Caninae.