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Ambystoma incomplete Metamorphosis

Neotenic_Jaymes

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Through out the years reading up on salamanders either articles or books. I've come a cross the term "incomplete metamorphosis" a couple times, referring to Ambystomatidae. Im not sure what defines this term and how often incomplete metamorphosis can happen. Anyone have the details? The articles/books were very vague.

I've had 2 Axolotls in the past and 1 currently showing signs of metamorphosis. Slowly but surely the dorsum has decreased significantly and the eyes are bulged out. Sometimes the eyes can retract into the socket and pop back out when swallowing food. Then all of a sudden the changes stop and it seems like now I have a salamander in paused metamorphosis. Maybe there is also a term for the stopped morphing?

I've had Tiger Salamander larvae morph and the dorsum and eyes were the 1st signs of change. Im not sure if (incomplete metamorphosis) would be the exact term for my Axolotl example. I'm assuming that it refers to Ambystoma or others salamanders that transition to land and retained larval traits.

Pictures are for comparison. The orange circle pin points the bulgy eye.
 

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