Well I can't see where there's anything that is particularly unreasonable here.
The appendage on the Jockey's face isn't a trunk, because a trunk is entirely made of soft tissues, so even if it did somehow fossilize, it wouldn't look like that.
Breathing tube is just a theory that I have stated as such - a theory, I haven't said it's fact, it's just an idea I have that makes sense, and can't be proved or disproved until the films state something that supports or contradicts the idea.