Artist Identification

There's a piece of concept art for the first movie that shows the T. rex attacking Grant and the kids in a raft, based on a similar scene from the novel. I have been unable to find who the artist was and am wondering if anyone here can help. They certainly deserve credit for it, whoever they are.

Spoiler:

UPDATE: I've done some searching and I believe it's by David Negron. The style fits the other concept art created by him. Though if anyone could confirm this, I would still appreciate it.