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. 2023 May 8;6:496. doi: 10.1038/s42003-023-04882-3

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Fig. 1 — The first two PCs are shown with their explained proportion of variance. The groups are displayed by coloured points corresponding to their respective order, as indicated by the colour code. Chimaeriformes (n = 1); Hexanchiformes (n = 3); Echinorhiniformes (n = 1); Pristiophoriformes (n = 2); Squatiniformes (n = 5); Squaliformes (n = 19); Heterodontiformes (n = 2); Orectolobiformes (n = 24); Lamniformes (n = 17); Carcharhiniformes (n = 71), number of specimens between brackets. Landmark variations between the maximum and minimum for each PC are displayed along the axes.