Hadrosaur
From Memory Alpha, the free Star Trek reference
The hadrosaur was an Earth dinosaur that lived in the Cretaceous period.
It was the most highly evolved cold-blooded organism to develop from the Eryops and was believed to have vanished when a mass extinction occurred at the end of the Cretaceous period. The hadrosaur was considered potentially to be a direct evolutionary predecessor of the Voth. (VOY: "Distant Origin")
The hologram depicts Parasaurolophus, one of many genera of hadrosaurs.
