Relative size of the three semicircular canals within bats.

<p>The three canals are depicted as follows: anterior – diamonds; lateral – triangles and posterior – circles. With members of the two bat clades represented as follows: Yinpterochiroptera [Old World fruit bats (orange), laryngeal echolocating species (blue)] and the Yangochiroptera (yellow). Species numbers follow those in Table S1 in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0061998#pone.0061998.s005" target="_blank">Text S1</a>.