Table 1.

Significant morphospace axes, showing percentage of overall morphological variance each describes. Last two columns provide snapshots of extreme morphologies at opposite ends of each RW axis, visualized using deformation grids in the software package tpsRelw 1.45 (Rohlf 2007). These grids are shown for RW1 and RW2 in figure 1b and higher axes in the electronic supplementary material.

RW	% variance	anatomical correlate (+ score)	anatomical correlate (− score)
1.	36.9	deep body	slender body
2.	25.7	long dorsal- and anal-fin bases	short dorsal- and anal-fin bases
3.	12.5	deep body, small caudal fin	slender body, large caudal fin
4.	7.10	short caudal peduncle	long caudal peduncle