Tell me about this stock movie monster roar

I’m pretty sure I’ve heard this monster roar in countless movies, parodies, video games, and as a general scream for demonic hellspawn. I was reminded of it watching the South Park episode “It Hits the Fan,” because they use it for the dragon. The only clip I could find of the sound from a specific source I remember was from good old Doom, when the Spider Mastermind sees you:

Clip 1 around 11 seconds
Clip 2 around 2.5 seconds

Does this sound have an industry name? Where did it first appear? What is it? Does it involve sacrificing a goat? Is it the true voice of Cthulhu? Give me the straight dope!

Thanks.

No idea, but it sounds like a lion. And here’s a bonus link of animal sounds: A1freesoundeffects.com

This guy might know the answer:
http://www.therecordist.com/video-game-audio/game-audio-samples

Monster madness has a collection of roars:
http://www.therecordist.com/soundbox-sfx/soundbox-sd/science-fiction

Sounds piggish to me.