Figure 7.

Phylogenetic distribution of development of the vomeronasal organ mapped to (A) molecular phylogeny (Teeling et al. 2005) and (B) morphological phylogeny (Simmons & Geisler, 1998; Gunnell & Simmons, 2005). The ancestral state reconstructs as an absent or rudimentary vomeronasal organ on either tree. A functional vomeronasal organ has evolved in four different families of bats. There is no consistent relationship between orofacial clefting and the degree of development of the vomeronasal organ.