Heliobatis ("sun ray") is a genus of stingray that lived during the Early Eocene period of Wyoming. It's teeth showed that it was specialized at feeding on small fish, crustaceans, and mollusks. It had a long tail with small spines running down the top of it. It had up to three barbed stingers on its tail.
In The Land Before Time
Heliobatis appears in one of the minigames of The Land Before Time Animated Moviebook.