Published as part of Froufe, Elsa, Gonçalves, Duarte V., Teixeira, Amílcar, Sousa, Ronaldo, Varandas, Simone, Ghamizi, Mohamed, Zieritz, Alexandra & Lopes-Lima, Manuel, 2016, Who lives where? Molecular and morphometric analyses clarify which Unio species (Unionida, Mollusca) inhabit the southwestern Palearctic, pp. 597-611 in Organisms Diversity & Evolution (New York, N.Y.) 16 (3) on page 607, DOI: 10.1007/s13127-016-0262-x, http://zenodo.org/record/13173550

Fig. 4 Unio delphinus (white symbols) and Unio foucauldianus (black and grey symbols) shell outline principal component scores for the first two PC axes obtained on 18 Fourier coefficients. Synthetic shell outlines of 'extreme' morphotypes are displayed with the anterior margin facing to the left and the dorsal margin to the top of the page. For population information, please see Fig. 1 and Table S1, Supporting information