Fig. 4From: Elongation during segmentation shows axial variability, low mitotic rates, and synchronized cell cycle domains in the crustacean, Thamnocephalus platyurusPCA biplot with tagma grouping. 423 individuals are plotted along PC1 and PC2 and grouped by tagma (in which the measures were made). PC1 explains 64% of the total variance in the data and separates individuals by tagma; a linear regression of PC1 on tagma indicates that “tagmata” are a good predictor of PC1 (adj R2 = 0.78; p < 0.001). Each tagma group is significantly different from one another (Type II MANOVA; F9,1272 = 103.06, p < 0.001). In addition, thoracic pre- and post-molt segments form clusters that are significantly different from all other tagmaBack to article page