Paedomorphosis

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paedomorphosis

[‚pēd·ə′mȯr·fə·səs]
(evolution)
Phylogenetic change in which adults retain juvenile characters, accompanied by an increased capacity for further change; indicates potential for further evolution.

Paedomorphosis

 

the resemblance of an adult individual to its juvenile form. Paedomorphosis is observed when the adult (imago) and juvenile forms exist under the same conditions. It especially characterizes animals with little capacity for movement. Organisms marked by paedomorphosis include the caterpillar-like female casebearers of the family Coleophoridae (although there is a pupal stage between the larval and imago stages) and the wingless females of the orders Embiodea and Grylloblattida. Paedomorphosis may be associated with neoteny.

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This site is characterized by a mixed population of paedomorphic and metamorphic salamanders.
However, we feel that her theories on paedomorphic character ambiguity may also cause inaccurate assessment of salamander relationships when investigating kidney anatomy alone.
on the development of various floral morphs in Amsinckia spectabilis (Boraginaceae) also indicate that both paedomorphic and peramorphic ontogenies are involved in the derivation of small homostylous flowers from their putative ancestor; namely, populations having large distylous flowers (see section IX.
The paedomorphic development also shortened Chaloneria's life history and caused earlier reproduction.
Jones concluded that the shift to earlier flower production in the cultivar was a result of paedomorphic development by progenesis.
The eastern group has a life history that includes an obligate metamorphosis, the Mexican assemblage contains species that are obligately paedomorphic (i.
In addition, paedomorphic larvae retain the ability to metamorphose.
Intraspecific heterochrony and life history evolution: decoupling somatic and sexual development in a facultatively paedomorphic salamander.
The observation, coupled with (a) the fact that almost all obligate cave dwelling salamanders are paedomorphic, i.
Ambystoma tigrinum is a facultative paedomorph, meaning it can exhibit either the metamorphic or paedomorphic state upon maturity.
The mole salamander (Ambystoma talpoideum) is one of the few animal species said to be facultatively paedomorphic, meaning it can exhibit either a complex life cycle (CLC) by undergoing metamorphosis, or a simple life-cycle (SLC) by achieving sexual maturity as a larva, making A, talpoideum an ideal species for the study of life-cycle evolution (I).