How old are axolotls?

B

benjamin

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I recently saw an educational film which stated that many lakes often only last some tens of thousands of years, depending on size and temperature. I was wondering: if the axolotl is exclusive to only a few interconnected lakes, then it can't have been around for a very long time. Does anybody know specific information about how old the axolotl is as a species?
 
Axolotls could very well have existed in terrestrial 'tiger salamander' form before developing neotenic traits. They also could have migrated from other ponds.
 
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    FragileCorpse: I also asked this as an actual question in a thread in case anyone wants to answer it there... +1
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