In Patzquaro, Michoacan several years ago, in the funkiest primordial Mexican market I have had the pleasure of exploring, one lady was selling these whopping-huge hellbender-like salamanders. I had wondered if they were meant to be eaten or had medicinal or ritualistic uses. With a little wiki- research it looks like that while hellbenders are out of range for southern Mexico (it must have been a cousin,) I also learned that Native American peoples would eat such salamanders, so those hefty critters at the market were likely meant to be consumed. I also found evidence of consumption of "ajolote" salamanders in this region of Mexico, though this breed more resembles the axolotl blind cave salamander with the ruffly red gills. At
http://www.mexconnect.com/mex_/recipes/puebla/kg0306.html I found the following description:
"Ajolote: salamander, a pre-Hispanic food still eaten in the lake regions of central and southern Mexico. They are steamed with onions and tomatoes in corn husks, or fried and served in a tomato sauce."