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
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
Olm
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The olm or proteus is an aquatic salamander which is the only species in the genus Proteus of the family Proteidae and the only exclusively cave-dwelling chordate species found in Europe; the family's
Neoteny
…disadvantageous for insects to metamorphose into adults. Many species of salamander, and amphibians in general, are environmentally neotenous. Axolotl and olm retain their gills and juvenile aquatic form throughout adulthood, in full neoteny. Gills are a common juvenile characteristic in amphibians which are…
Proteus anguinus Postojnska Jama Slovenija
The olm as depicted by the French biologist Gaston Bonnier in 1907
The front part of the olm's head carries sensitive chemo-, mechano-, and electroreceptors.
The olm swims by serpentine bending of the body.