Table 1.

Quantitative analysis of shape similarities between patterning outcomes and normal head shapes of three species.

Procrustes Distances between Morphologies	WT GD after 10 days in Water	Pseudo GD	WT GD	Pseudo DJ	WT DJ	Pseudo PF	WT PF	Pseudo SM
WT GD	0.10	0.10
Pseudo DJ	0.14	0.16	0.19
WT DJ	0.16	0.18	0.15	0.14
Pseudo PF	0.38	0.38	0.40	0.27	0.33
WT PF	0.41	0.39	0.42	0.32	0.37	0.09
Pseudo SM	0.21	0.23	0.25	0.09	0.17	0.21	0.26
WT SM	0.28	0.27	0.24	0.23	0.14	0.31	0.35	0.22

Comparison of average Procrustes distances between wild-type, and experimentally-derived altered morphologies. Comparisons of particular interest are shown in boldface. Procrustes distances are larger between wild-type G. dorotocephala morphologies and the altered species-specific morphologies produced by 8-OH treatment, than between fragments that regenerated G. dorotocephala-resembling heads. In addition, Procrustes distances between 8-OH treated regenerates with altered morphologies, and the species that they resemble, are smaller than distances between regenerates and WT G. dorotocephala morphologies. Procrustes ANOVA of centroid size p < 0.0001. GD = G. dorotocephala; DJ = D. japonica; PF = P. feline; SM = S. mediterranea.