Posted on 04/08/2015 6:41:36 PM PDT by grundle
Some of the largest animals to ever walk on Earth were the long-necked, long-tailed dinosaurs known as the sauropods—and the most famous of these giants is probably Brontosaurus, the "thunder lizard." Deeply rooted as this titan is in the popular imagination, however, for more than a century scientists thought it never existed.
The first of the Brontosaurus genus was named in 1879 by famed paleontologist Othniel Charles Marsh. The specimen still stands on display in the Great Hall of Yale's Peabody Museum of Natural History. In 1903, however, paleontologist Elmer Riggs found that Brontosaurus was apparently the same as the genus Apatosaurus, which Marsh had first described in 1877. In such cases the rules of scientific nomenclature state that the oldest name has priority, dooming Brontosaurus to another extinction.
Now a new study suggests resurrecting Brontosaurus. It turns out the original Apatosaurus and Brontosaurus fossils appear different enough to belong to separate groups after all. "Generally, Brontosaurus can be distinguished from Apatosaurus most easily by its neck, which is higher and less wide," says lead study author Emanuel Tschopp, a vertebrate paleontologist at the New University of Lisbon in Portugal. "So although both are very massive and robust animals, Apatosaurus is even more extreme than Brontosaurus."
The nearly 300-page study analyzed 477 different physical features of 81 sauropod specimens, involving five years of research and numerous visits to museum collections in Europe and the U.S. The initial goal of the research was to clarify the relationships among the species making up the family of sauropods known as the diplodocids, which includes Diplodocus, Apatosaurus and now Brontosaurus.
The scientists conclude that three known species of Brontosaurus exist: Brontosaurus excelsus, the first discovered, as well as B. parvus and B. yahnahpin. Tschopp and his colleagues Octávio Mateus and Roger Benson detailed their findings online April 7 in PeerJ. "We're delighted that Brontosaurus is back," says Jacques Gauthier, curator of vertebrate paleontology and vertebrate zoology at Peabody, who did not participate in this study. "I grew up knowing about Brontosaurus—what a great name, 'thunder lizard'—and never did like that it sank into Apatosaurus."
For vertebrate paleontologist Mike Taylor at the University of Bristol in England, who did not take part in this research, the most exciting thing about this study is "the magnificent comprehensiveness of the work this group has done, the beautifully detailed and informative illustrations and the degree of care taken to make all their work reproducible and verifiable. It really sets a new standard. I am in awe of the authors," he says. Vertebrate paleontologist Mathew Wedel at Western University of Health Sciences in Pomona, Calif., who also did not collaborate on this paper, agrees, saying "the incredible amount of work here is what other research is going to be building on for decades."
Tschopp notes their research would have been impossible at this level of detail 15 or more years ago. It was only with many recent findings of dinosaurs similar to Apatosaurus and Brontosaurus that it became possible to reexamine how different they actually were and breathe new life into Brontosaurus, he says.
Although while Kenneth Carpenter, director and curator of paleontology at Utah State University Eastern's Prehistoric Museum, finds this study impressive, he notes the fossil on which Apatosaurus is based has never been described in detail, and suggests the researchers should have done so if they wanted to compare it with Brontosaurus. "So is Brontosaurus valid after all?" he asks. "Maybe. But I think the verdict is still out."
All in all, these findings emphasize "that sauropods were much more diverse and fascinating than we've realized," Taylor says. Indeed, the recognition of Brontosaurus as separate from Apatosaurus is "only the tip of the iceberg," he adds. "The big mounted apatosaur at the American Museum of Natural History is probably something different again, yet to be named. Yet another nice complete apatosaur, which is in a museum in Tokyo, is probably yet another new and distinct dinosaur."
This sauropod diversity emphasizes "that the Late Jurassic [period] of North America in which they lived may have been a weird time," Wedel says. "You basically had an explosion of these things in what could be harsh environments, which raises the question of how they could have found enough food to have supported them all." In other words, research that helped resurrect Brontosaurus may have birthed new mysteries as well.
How apropos - “Jurassic Park” is airing on AMC right now and will run again tomorrow at 3:00 PM.
ping...
"One of these things is not like the other, one of these things just doesn't belong..."
Brontosaurus deniers are losing. What about the settled science?
Bringing back the Brontosaurus classification fits what agenda?
Read my post again.
Like time on a clock, the Scientific American is destined to get some facts correctly at least a couple of times per day.
Very glad to read this as I grew up with Brontosaurus as my favorite dinosaur back in the ‘50s and was very disappointed to learn some dozen years ago or so that they were dropping that name in favor of the boring name Apatosaurus.
“Brontosaurus deniers are losing. What about the settled science?”
There is no such thing as settled science. If it is science, it can never be settled. Real science can only demonstrate improved and improving observations of phenomena and conjecture with proposed future observations leading to more reliable observations.
In the case of the Brontosaurus, the acquisition of additional evidence made it possible to observe previously unobserved characteristics in the fossil evidence. Consequently, it is now possible to observe enough differences to differentiate the Brontosaurus from the Aptosaurus in their biological classifications. There is nothing Earth shattering about discovering previously unseen fossils. The only thing remarkable about such a find is longstanding popularity of the depictions of the Brontosaurus in the media for more than a century.
Jurassic Park is frightening in the dark
All the dinosaurs are running wild
Someone shut the fence off in the rain
I admit it’s kinda eerie
But this proves my chaos theory
And I don’t think I’ll be coming back again
Oh no
-Weird Al
“Is that important and why not stress that aspect?”
We frequently hold the Scientific American up to criticism, because it is so frequently wrong about so many things it publishes in these days under its latest publishers. Even so, correct information must in honesty be acknowledged no matter what the source of publication may be. From a scientific point of view the revision of the biological classification is nothing remarkable at all, given the very low numbers of partial fossil specimens used to formulate the earlier classifications. As more and more sets of fossils can be retrieved and in better conditions it becomes possible to observe more similarities and/or more differences in those individual animals. Such observations then make it possible to formulate more accurate and reliable classifications of the animal groups who share the same characteristics. Everyone needs to look farther than the Scientific American, however, to verify the observations of the evidence and evaluate any conclusions made about such observations.
Not enough information. I have to know what the libs think about this so I can take the opposite position.
“Brontosaurus deniers are losing. What about the settled science?”
“”There is no such thing as settled science. If it is science, it can never be settled.””
Yes.
But, the is such a thing as sarcasm.
“But, the is such a thing as sarcasm.”
You may conjecture there “is such a thing as sarcasm,” but you have presented no such observational evidence supporting a hypothesis of its existence, much less a theory of its existence.
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