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. 2017 Dec 6;5:e4081. doi: 10.7717/peerj.4081

Figure 2. Principal Component Analysis (PCA) results for the whole group of sharks.

Figure 2

PCA plots of the first two PC axes showing the distribution of (A) taxonomic groups at order level and (B) modes of life according to Thomson & Simanek (1997). The phylogenetic tree (modified from Vélez-Zuazo & Agnarsson, 2011) is mapped into the PCA morphospace. Wireframe configurations show shape changes from the negative to the positive extreme of the axes (black and red respectively).