Relative (A) anterior, (B) lateral and (C) posterior semicircular canal size versus relative cochlea size.

<p>The OLS regression of non-bat mammals is shown by the bold line (anterior: <i>r = </i>0.954, <i>P</i> = 3.48×10⁻²⁰; lateral <i>r</i> = 0.946, <i>P</i> = 1.91×10⁻²¹; posterior <i>r</i> = 0.951, <i>P</i> = 7.29×10⁻²¹), and the 95% confidence and prediction intervals are shown by the solid and dashed lines respectively. Non-bat placental mammals (grey circles) and marsupial mammals (grey triangles) from Spoor <i>et al</i>. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0061998#pone.0061998-Spoor3" target="_blank">[17]</a>. Pteropodidae (orange circles), Yangochiroptera (yellow circles), <i>Pteronotus parnellii</i> (gold circle), Rhinolophidae (dark blue circles), and remaining echolocating Yinpterochiroptera (medium blue circles) represent the bat species included by this study.