Table 4. Overview of heterochronies in saurischian skull shape.
The differences of the regression scores (ΔRS) and the Euclidean distances (ΔED) between ancestor-descendent relationships of adult individuals from the regression analysis (Figs. 4B and 4C) and the interpretation regarding heterochrony.
| ΔRS | ΔED | Heterochrony | |
|---|---|---|---|
| Saurischia-Massospondylus | −0.0262 | −0.0446 | Paedomorphosis |
| Saurischia-Neotheropoda | 0.0629 | 0.0733 | Peramorphosis |
| Neotheropoda-Coelophysis | 0.0140 | 0.0668 | Peramorphosis |
| Neotheropoda-Orionides | 0.0146 | (−0.0079) | NA |
| Orionides-megalosaurid taxon | 0.0507 | 0.0497 | Peramorphosis |
| Orionides-Avetheropoda | −0.0299 | −0.0256 | Paedomorphosis |
| Avetheropoda-Allosaurus | 0.0153 | (0.0066) | NA |
| Avetheropoda-Tarbosaurus | −0.0145 | (0.0015) | NA |
| 95% CIs | 0.0078 | 0.0098 | |
| Significance levels (p = 0.05) | 0.0117 | 0.0147 |
Notes.
ΔRS and ΔED values in brackets mark insignificant trends.
- NA
- not available