Morphological separation of treatment groups. Scatterplot for the first two axes derived from a principal component analysis (PCA) of LPJ landmark data. Percentage of variance explained by the axes is given in parentheses. Note that the large overlap of convex hulls of 'ground' and 'with shell' groups is mainly brought about by two extreme individuals in the 'ground' group.
Muschick et al. BMC Evolutionary Biology 2011 11:116 doi:10.1186/1471-2148-11-116