closeup on adult critically endangered neotenic anderson's salamander ,ambystoma andersoni

amphibia achoque ambystoma andersoni ambystomatidae amphibian chordata caudata ecology mexican mexico nature status urodela zacapu animal anomaly aquatic biology close up closeup critically endangered herpetology macro mole salamander neotenic neoteny newt no person one outdoor paedomorph predator protected red list single tailed threatened underwater vertebrata vertebrate water wildlife zoology