They never revealed his name. Don't know why. I have heard that he was a real guy from there who knew the tribes.

Who cares? It's not important how big it is, the only thing that counts is how you use it.
And maybe he is a grower, not a shower.

hE HAD A GREAT BODY AND HANDSOME FACE BUT RUINED IT IN THAT NUDE SCENE , HIS PENIS WAS SO SMALL !!!!!!!

The guy who played Miguel, like the guy who played Felipe, was a real jungle guide for the actual crew. Almost all sites talking about the film said that Ricardo Fuentes played Felipe, but in a recent interview, Carl Gabriel Yorke said that the actor who played Felipe was named Guillermo.
I've never heard any member of the crew said that Miguel was played by Ricardo Fuentes. Because Ricardo Fuentes also could be Lieuteant Ochoa, like a relevant character.
Sorry for my bad english.

Ricardo Fuentes, with his beautiful face and ripped body played Miguel. IMDB, for some reason, hasn't done their homework and listed him as
Unknown Character
on the details page for this movie.
This is Dorsia?

I was thinking the same thing as well. The strip scene was fantastic.
I get high on hydroponic weed

This is funny because I was thinking the same exact thing as the OP and am surprised to see that someone brought it up here. During the scene where he takes off all his clothes to bait the natives I was just like "DAMN." Haha.

I think his name is Lionello Pio di Savoia.

I was wondering the same thing. I find it strange his name wasn't in the credits for his performance.
Come, fly the teeth of the wind. Share my wings.