Fig. 6
Geographical patterns of multivariate morphological variation in Heremites vittatus. 3D projection of the first, second and third axis of the multidimensional scaling analysis (MDS) of 27 morphological traits (n = 146 specimens). MDS axes 2 and 3 are plotted in Z and Y planes, respectively, for easier demonstration of spatial patterns. Samples are color-coded to indicate latitude (a) or longitude (b) of the collection site, according to the color gradient legends at the bottom. η2 estimates represent the effect of latitude/longitude on the position in the morphospace (point estimate: type 2 MANOVA using Pillai’s test on results of multivariate multiple regression; 95% confidence intervals: Bootstrap analysis with 105 repeats). In all figures, NS = not significant, * P < 0.05, ** P < 0.01, *** P < 0.001, **** P < 0.0001