Jim Morrison, lead singer of the Doors, styled himself the Lizard King a nickname that stuck. So when a paleontologist who happens to be a Doors fan came across the fossil of a giant lizard, one of the largest ever to trod the planet, he named it Barbaturex morrisoni, after the enigmatic rock n roller.
Ive been a Doors fan since college, said Jason Head, an assistant professor in the Earth and Atmospheric Sciences Department at the University of Nebraska at Lincoln. A description of the fossils, which existed 40 million years ago, was published this month in the biological science journal Proceedings of the Royal Society B. Heads co-authors are Patricia Holroyd of the University of California at Berkeley, Gregg Gunnell of Duke University and Russell Ciochon of the University of Iowa.
Weighing in at an estimated 60 pounds and measuring 6 feet, the lizard king would dwarf todays plant-eating 11-pound iguanas. But B. morrisoni would probably be smaller than its distant relative, the island-dwelling Komodo dragon, which eats meat and can grow to 10 feet and weigh 200 pounds.
Head said the fossils came from Burma, but thats not where they found them. They had been sitting in a museum collection at the University of California Museum of Paleontology since the 1970s, along with other lizard remains that had not been thoroughly examined.
As his team worked, Head noticed the herbivore teeth and a jaw that held beneath it some spiky material, a telltale sign that the creature resembled modern lizards that are much smaller. In time, the scientists realized that they were looking at something special. Its a plant-eating lizard from a time period and a place from which we dont have a lot of information, Head said.
When he studied its modern relatives, I realized just how big this lizard was, Head said. It struck me that we had something here that was quite large and quite unique.
The researchers theorize that at a time when no ice existed at Earths poles, carbon dioxide was high and the diversity of plant life was tremendous, these lizards ate their fill and evolved into giants in spite of the presence of animals that preyed on plant eaters.
Youve got to figure out a name that fits, Head said. Because of the stuff hanging from the lizards jaw, he thought it was like a bearded king. Then his writhing singing idol came to mind.
The name was appropriate in so many ways. Research suggests that todays reptiles could go the way of Morrison, who died under mysterious circumstance in 1971 at age 27.
Were changing the atmosphere so fast that the rate of climate change is probably faster than most biological systems can adapt to. So instead of seeing the growth of reptiles, what you might see is extinction, Head said.