Apiaceae can be considered a predominantly herbaceous derivative of Araliaceae in which instances of secondary woodiness, which would involve paedomorphosis
(Carlquist, 2009), occur.
Thus "a species undergoing paedomorphosis
will find itself in possession of a number of genes whose functions were to control characters which no longer appear, since the old adult characters will be lost in neoteny....
Evolutionary ecology of facultative paedomorphosis
in newts and salamanders.
Approximately 10% of all species of salamander express either obligate or facultative paedomorphosis
"This phenomenon, where a change in the developmental timing of a creature produces morphological changes is called heterochrony, and paedomorphosis
is one example of it," Abzhanov explained.
Ontogeny discombobulates phylogeny: paedomorphosis
and higher-level salamander relationships.
Such extreme sexual dimorphism involving paedomorphosis
is unique among siboglinids, as all other known species of frenulates and vestimentiferans have equal-sized sexes (Ivanov, 1963; Bakke, 1990; Gardiner and Jones, 1993).
Such traits include cyclomorphosis and other dimorphisms associated with protective structures ("protective" dimorphisms), paedomorphosis
, diapause, some cases of sex determination (e.g., in many species of reptiles and some fish), trophic dimorphisms (e.g., cannibalistic versus herbivorous morphs), pupal color (swallowtail butterflies), dimorphic variation in "weaponry" (e.g., horns and forceps in insects, tentacles in some species of hydroids), body size (e.g., "jacking" in salmon), and wing dimorphism in insects (for a review of these and other types of dimorphic variation, see Roff 1996a).
Quantitative data included here as indicators of relative mesomorphy or xeromorphy of particular woods, and as a way of documenting presence of protracted juvenilism (paedomorphosis
Analysis of morphological changes in ancestral and descendant taxa and comparison between modern groups may indicate the presence of heterochrony (i.e., change in time or rate of events during development) and reveal whether the differences are the result of paedomorphosis
or peramorphosis (Klingenberg, 1998).
is the condition wherein an animal become sexually mature before metamorphosis, with the result being that many larval/juvenile features are retained in the adult stage of the life cycle.