| 7 | Heterochrony and the Parallel of Ontogeny and | |
| Phylogeny | 209 |
| Acceleration and Retardation 209 | |
| Confusion in and after Haeckel's Wake 209 | |
| Guidelines for a Resolution 211 | |
| The Reduction of de Beer's Categories of Heterochrony to | |
| Acceleration and Retardation 221 | |
| A Historical Paradox: The Supposed Dominance of | |
| Recapitulation 228 | |
| Dissociability and Heterochrony 234 | |
| Correlation and Dissociability 234 | |
| Dissociation of the Three Processes 236 | |
| A Metric for Dissociation 238 | |
| Temporal Shift as a Mechanism of Dissociation 244 | |
| A Clock Model of Heterochrony 246 | |
| Appendix: A Note on the Multivariate Representation | |
| of Dissociation 263 | |
| 8 | The Ecological and Evolutionary Significance of | |
| Heterochrony | 267 |
| The Argument from Frequency 267 | |
| The Importance of Recapitulation 267 | |
| The Importance of Heterochronic Change: Selected Cases 269 | |
| Frequency of Paedomorphosis in the Origin of Higher Taxa 277 | |
| A Critique of the Classical Significance of Heterochrony 282 | |
| The Classical Arguments 282 | |
| Retrospective and Immediate Significance 285 | |
| Heterochrony, Ecology, and Life-History Strategies 289 | |
| The Potential Ease and Rapidity of Heterochronic Change 294 | |
| The Control of Metamorphosis in Insects 294 | |
| Amphibian Paedomorphosis and the Thyroid Gland 299 | |
| 9 | Progenesis and Neoteny | 303 |
| Insect Progenesis 304 | |
| Prothetely and Metathetely 304 | |
| Paedo genesis (Parthenogenetic Progenesis) in Gall Midges and Beetles 306 | |
| Progenesis in Wingless, Parthenogenetic Aphids 308 | |
| Additional Cases of Progenesis with a Similar | |
| Ecological Basis 311 | |
| Neotenic Solitary Locusts: Are They an Exception | |
| to the Rule? 312 | |
