Some articles on almamula:

Legendary Creatures Of The Argentine Northwest Region - Almamula or Mulánima
... If a woman had improper relations with one of the relatives of Almamula, he would punish that woman by transforming her into a series of different forms ... Later, Almamula would transform the woman into a mule ... Finally, Almamula would turn the unfortunate woman into a gigantic black dog with teeth of fire ...