Figure 3. A in The taxonomic status of some Atlanto-Mediterranean species in the subgenus Holothuria (Echinodermata: Holothuroidea: Holothuriidae) based on molecular evidence

Figure 3. A, distribution of 49 individuals of the Holothuria subgenus and four of Holothuria sanctori in the space defined by the first two axes of the principal components (PC) analysis on the basis of morphometric variables of the ossicles. The symbols indicate assignment to the three identified clades; labels of the individuals indicate the preliminary species identified (st, Holothuria stellati; m, Holothuria mammata; t, Holothuria tubulosa; d, Holothuria dakarensis; and s, Holothuria sanctori) and the locality according to Figure 1. B, the most important variables are presented. PC1 (+): mTArHdt, mTArHvt, mAdt, mAvt, mTArHvb. PC1 (-): sdXDHdt, sdNDHdt, mESIvb. PC2 (+): mESIdb, nESIdb, mArCvt. PC2 (-): mNHdb, sdPvb, sdXDvb, mPdb (see Table 2 and Appendix S1 for the meaning of the abbreviations of the variables).