Box plots showing univariate comparisons of A shell length B height:length ratio C width:length ratio D height:width ratio E normalised columellar tooth count F normalised labral tooth count, and G relative mass among the studied Umbilia armeniaca groups (subspecies or population). Black diamonds represent group means, boxes illustrate first and third quartile as box edges and median as central line. Shared alphabetic superscripts identify group means that are not statistically different (Holm-adjusted P ≥ 0.01) for a morphometric.