Pilo Lil
http://patagoniamonsters.blogspot.com/2009/11/patagonian-lakes-and-rivers-with.html
http://patagoniamonsters.blogspot.com/2009/12/plesiosaur-at-laguna-negra-plesiosaur_15.html
This monster is one among many in Patagonia which Aquabeasties found at Austin Whittall's wonderful Patagonian Monsters blog.
