Femoral diaphyseal shape variation in an ontogenetic sample of <i>Pan</i> taxa.

<p>A: Variation along the first two principal components of shape, PC1 and PC2 (filled circles: <i>P.t. troglodytes</i>, open circles: <i>P.t. schweinfurthii</i>, open triangles: <i>P.t. verus</i>, open squares: <i>P. paniscus</i>). Solid outlines show 95%-density ellipses for each taxon. B: plot of mean shapes at consecutive ontogenetic stages. m2: second deciduous molar erupted; M1/M2/M3: permanent molars 1/2/3 erupted. Gray symbols and dashed line indicate the inferred shape at each ontogenetic stage and ontogenetic trajectory of the last common ancestor.