neotenic development.    From Wordnet, Princeton University. 

Like the cute but dangerous Gloomy Bear who is adorable, neotenic and pink -- but a bear!.    From Wordnik.com.  [Electric Kawaii!] Reference

Tiger salamanders often become neotenic (retaining their larval forms) even reproducing as larvae, and only rarely metamorphosing into terrestrial adults.    From Wordnik.com.  [Adaptations of desert amphibians and reptiles] Reference

Sermonti therefore argues that neotenic organisms - in which juvenile traits persist into adulthood, e.g. gills in adult salamanders - must be archaic, because their features appear earlier in development.    From Wordnik.com.  [Of Form over Substance: a review of Sermonti - The Panda's Thumb] Reference

A preference of neotenic and youthful-appearing features.    From Wordnik.com.  [Archive 2009-04-01] Reference

These immatures can develop into winged sexuals that disperse and found a new nest or into neotenic replacement reproductives that inherit the natal colony.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

In Cercidiphyllum, the vegetative body is partly or mostly produced in the reproductive line, suggesting a neotenic ancestral form, in which the vegetative development was drastically reduced relative to reproductive domain.    From Wordnik.com.  [AvaxHome] Reference

While they share a bunch of traits that seem superficially more 'wolflike' than more 'derived' breeds-- less obedient, more pack oriented, single annual estrous, more likely to howl and yodel than bark a lot, den- digging-- they still fall strongly on the dog rather than wolf side of the divide behaviorally, still have more neotenic skulls, up- curled tails, still watch humans for cues and want to please-- the whole suite of things Darren mentioned, and more.    From Wordnik.com.  [Dog Origins] Reference

In fact we don’t know that the apparent neotenic features of domestic dogs result from artificial selection, given that neoteny can arise via other means, and it should at least be considered that the unwolf-like characters present in domestic dogs indicate derivation from a non-wolf ancestor.    From Wordnik.com.  [Archive 2006-10-01] Reference

A pubescent salamander is by definition neotenic.    From Wordnik.com.  ["Maybe yellow blotches, wrinkles, and phantom fetuses really get a pubescent neotenic mole salamander in the mood for love."] Reference

Euphyllopod ancestors by becoming neotenic.    From Wordnik.com.  [Konrad Lorenz - Autobiography] Reference