Borialosaurus is the oldest member of the Sinestro Corps.

He comes from an ancient race of creatures known as Borialosaurus that were once carnivorous sea animals on the planet Maltus billions of years ago. His kind was all but hunted out of existence after they attacked and killed dozens of Guardians.

Borialosaurus was one of the countless Sinestro Corps soldiers present on Qward when Kyle Rayner who was possessed by Ion at the time was forcefully taken to their location by a Yellow Power Ring. He was seen restraining Rayner's arms behind his back while Sinestro instilled fear into him as part of his plan to separate the Ion entity from Kyle Rayner. Borialosaurus's current status is unknown.





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Sinestro Corps member
This character is or was a member of the Sinestro Corps, chosen by Sinestro to counteract the Green Lantern Corps and spread terror throughout their sector with a Power Ring.

This template will categorize articles that include it into the "Sinestro Corps members category."

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Green Lantern Villain(s)
This character is or was primarily an enemy of the Green Lantern of Earth, or the Green Lantern Corps as a whole. This template will categorize articles that include it into the category "Green Lantern Villains."
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