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Visualization of superimposed scatterplots of PC1 and PC2 from analyses of 20 ape crania using landmarks and semilandmarks from sliding TPS, LS&ICP, and TPS&NICP approaches with varying densities. The horizontal axis represents PC1 and the vertical, PC2. Cross: Pongo abeli. Circle: Gorilla. Rectangle: Pan troglodytes; Triangle. Hylobates lar. Amber: Sliding TPS. Blue: TPS&NICP. Magenta: LS&ICP.
