'The Howling of Distant Shadows is issue 15 of the TMNT Adventures, and was published in October 1990.
Storyline
The turtles, April O'Neil and Jagwar raft across the rainforests of Brazil. Reaching areas untouched by modern man, they end up meeting dinosaurs and a werewolf-like creature named Dreadmon as well as assist the villagers in stopping illegal slavery in the nearby mines.[1]