Table S2.

Shape changes of the malleus, incus, and stapes associated with the first three PCs

Ossicle and PCVariance explained, %Shape changes associated with increasing PC scores
 PC 128Increase in manubrium length; increase in spatula inflection; decrease in articular facet size; decrease in anterior–posterior flattening of the head
 PC 219Widening of the angle between the manubrium and the head; increase of spatula inflection
 PC 311Increase in the size of the medioinferior part of the articular facet
 PC 129Decrease in intercrural curvature; increase in the distance between the tips of long and short processes; decrease in short processus length; decrease in the size of the superior–anterior part of the articular facet
 PC 217Decrease in long process length; increase of long process curvature; decrease in asymmetry of intercrural curvature (because of opposite size trends of the two processes); more anteriorly rotated articular facet relative to the intercrural curvature; decrease in articular facet size
 PC 314Narrower but more strongly superior–inferior extending articular facet
 PC 141Increase in stapes height; more kidney-shaped footplate; increase in the asymmetry (in relative length) of the crura
 PC 220Decrease anterior crus; increase posterior crus; more posterior–laterally inclined footplate; more anterior–medially inclined head
 PC 39Decrease in convex rounding of two crus; decrease size of the footplate; more narrow and regular shape of footplate