Discosauriscus
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Discosauriscus was a small seymouriamorph which lived in what is now Central and Western Europe during the latest Carboniferous and in the Early Permian Period. Its best fossils have been found in the
Letoverpeton austriacum
A reconstruction of a juvenile Discosauriscus with external gills
Fossil in Vienna
Neoteny
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Neoteny, also called juvenilization, is the delaying or slowing of the physiological or somatic development of an organism, typically an animal. Neoteny in modern humans is more significant than in ot
Discosauriscus
…and Discosauriscus pulcherrimus. Letoverpeton is a junior synonym of Discosauriscus. Discosauriscids were long thought to be known from larval or neotenic forms, and three ontogenetic stages had been distinguished. However, more recent studies concluded that some subadult, probably terrestrial specimens…
Neoteny and reduction in skull size – grey wolf and chihuahua skulls
The axolotl (Ambystoma mexicanum) is a neotenous salamander, often retaining gills throughout its life.
Trilobite beetles (Platerodrilus ngi pictured) are a genus of beetles with larviform females; other Elateroid beetles may also have these