| Heterochrony refers to the change in the timing and rate of developmental events, and it is a widespread feature in amphibian evolution, particularly in salamanders. |
| For example, many of the changes in plant forms have been engendered by heterochrony or heterotopy. |
| Neoteny, once a widely used label for the condition of sexually mature larvae, has been discontinued by biologists and replaced by the concept of heterochrony. |
| Heterochrony is often cited as a pathway for the appearance of evolutionary novelties. |
| Heterochrony is not confined to salamanders. |
