Trachodon millerensis

    "November 5, 1925: I wound up being the first to see this animal, and thus named it before seeing its ultimate fate; as Malone, Summerlee and I went down to the lake, we saw this quiet, peaceful herbivore drinking from its waters.

    A minute after I decided on a name, an Allosaurus bolted out of the nearby jungle and snapped its neck with its powerful jaws. A stupid, immature portion of my psyche demanded to bolt out of the forest and vent my umbrage upon the brute, but a much greater part demanded my retreat to the caves in the cliff-face."

Reality Check: This is the Trachodon from the 1925 version of "The Lost World".