Figure 3

Ancestral reconstruction of bat (A) relative basilar membrane length and (B) number of cochlear turns using phylogenetic independent contrasts. Phylogenies and character values are depicted as ‘Traitgrams’, whereby the position along the y-axis corresponds to node age in millions of years and position along the x-axis corresponds to the reconstructed character value. Coloured bars indicate key subdivisions within bats: Old World fruit bats (orange); echolocating Yinpterochiroptera (blue); Yangochiroptera (green). In each traitgram, keys nodes are depicted as follows: bat common ancestor (a); Yangochiroptera common ancestor (b); Yinpterochiroptera common ancestor (c); Old World fruit bat common ancestor (d); echolocating Yinpterochiroptera common ancestor (e).