I recently examined specimens from Ambystoma silvense. They have large neotenic adults (much larger than the larvae of A. rosaceum) with long, narrow heads and a rounded, blunt snouts. They have very thick external gill stalks, with the middle gill stalk being the longest. They are a yellow-brown color with black spots on their backs, and smaller spots on their sides and around their eyes. The spots are close together, and some are blotchy. Some have spots on their underbellies as well. Their toes are very thick and short.
I have pictures, but unfortunately (as with all my species pictures) they are of dead specimens. There are also transformed adults, but I have not seen them.
(Message edited by Lollia on June 21, 2006)