Box plots showing univariate comparisons of A length (L) B width to length ratio (W/L) C height to length ratio (H/L) D height to width ratio (H/W) E normalised labral tooth count (nLT) and F normalised columellar tooth count (nCT) among the accepted subspecies of Umbilia hesitata (U. h. hesitata, U. h. beddomei, U. h. suprastrata) and U. tomdarraghi sp. nov. Diamonds represent group means, boxes illustrate first and third quartile as box edges and median as central line. Shared superscripts identify means that are not statistically different (Holm-adjusted P ≥ 0.01) among taxa.