Dinosaurs were not reptiles. Reptiles are cold blooded, and the idea that dinosaurs were warm blooded has been generally accepted since the 1980s at least.
Dinosaurs are reptiles. Not all reptiles are dinosaurs.
The article states that is was NOT a dinosaur.
We don't have the vaguest idea what dinosaurs were. Just about all we have is bones. That's way insufficient to classify then as anything in particular. That is why they have always been considered some sort of subclass of reptiles. Even that though there is no justification for aside from their living on land and having been around at the same time as reptiles. Every day there is some new theory about dinosaurs. Reason is that there is nothing like it in existence and bones do not supply enough information to tell what they are.
And BTW, the only person to have ever found usable dinosaur DNA is Michael Crichton.