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In Solving An Ancient Whodunit, Geologists Conclude That Even In The Miocene, The Rhino Reigned Supreme

Date:
April 8, 2004
Source:
University At Buffalo
Summary:
Lions may get all the good press about being "king of the jungle," but the modern animal that has no predators in the wild, except for man, is the rhinoceros and that probably was the case as long as nine million years ago, recent University at Buffalo research demonstrates.

Jawbone from a baby teleoceras excavated by UB research team. Pair of bite marks suggests death by predation.
Credit: Image courtesy University At Buffalo

BUFFALO, N.Y. -- Lions may get all the good press about being "king of the jungle," but the modern animal that has no predators in the wild, except for man, is the rhinoceros and that probably was the case as long as nine million years ago, recent University at Buffalo research demonstrates.

The UB researchers came to that conclusion based on their analysis of more than 100 specimens that they excavated during the past two summers from pastureland in northwestern Kansas.

The UB research is being presented tomorrow (April 1, 2004) to scientists at a Geological Society of America meeting (North-Central section) in St. Louis.

Led by William Korth, Ph.D., research assistant professor in the Department of Geology in the UB College of Arts and Sciences, that excavation revealed bones from juvenile Teleoceras individuals, precursors to the modern rhino.

Studies on these specimens are providing the researchers with information about the Miocene epoch and, in particular, about the lives and habits of this species of rhinoceros, which, the UB scientists say, is closer in body shape to the modern-day hippopotamus.

"We're looking for what the environment was like then and how these creatures lived," said Korth.

The clues lie in the excavation and analysis of the bones and rocks in which they were embedded.

Indeed, the UB researchers approached the find as though as it were an ancient whodunit.

"We're like the C.S.I. of the Miocene," Korth said.

They could tell that the bones were from very young animals because the ends of the bones were not yet fused.

The UB researchers first thought they might have uncovered a calving site, where newborns and their mothers are especially vulnerable to predation.

However, they ruled out that possibility because of the absence of bones from the mothers, a finding that confirmed the idea that even nine million years ago, this ancestor of the modern adult

rhinoceros probably had no predators.

"Modern rhinos have no predators because they are very large and fierce and their horns are a deadly defensive weapon," said Kara Bartley, a master's-degree candidate in the UB Department of Geology, who is the principal researcher on this work.

That's why, she explained, there is far more mortality today among juvenile rhinos than adults, who die from natural causes or in natural disasters, not from predation.

Based on the kinds of bones found and the types of bite marks on the bones, the UB geologists now hypothesize that the bones are from individuals who were first preyed upon and then scavenged after death.

"A predation/scavenging scenario would make perfect sense because babies would be easy to ambush and carry away from the mother to another site," said Bartley.

After death, she added, the limbs were probably ripped off by scavengers, which explains the fact that the researchers found heads, backbones and ribs at the site, but very few limbs.

"We're essentially documenting stasis here," said Charles E. Mitchell, Ph.D., professor and chair of the UB Department of Geology. "These animals were not exactly the same as modern rhinos, but it turns out that the hardships and selection pressures they faced were of the same basic sort we see now.

"This is a case where, the more things change, the more they stay the same and while such findings may not be as emotionally interesting as dramatic changes, they, too, are an important part of the dynamic of evolution," he added.

The University at Buffalo is a premier research-intensive public university, the largest and most comprehensive campus in the State University of New York.


Story Source:

The above story is based on materials provided by University At Buffalo. Note: Materials may be edited for content and length.


Cite This Page:

University At Buffalo. "In Solving An Ancient Whodunit, Geologists Conclude That Even In The Miocene, The Rhino Reigned Supreme." ScienceDaily. ScienceDaily, 8 April 2004. <www.sciencedaily.com/releases/2004/04/040407081342.htm>.
University At Buffalo. (2004, April 8). In Solving An Ancient Whodunit, Geologists Conclude That Even In The Miocene, The Rhino Reigned Supreme. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2004/04/040407081342.htm
University At Buffalo. "In Solving An Ancient Whodunit, Geologists Conclude That Even In The Miocene, The Rhino Reigned Supreme." ScienceDaily. www.sciencedaily.com/releases/2004/04/040407081342.htm (accessed April 24, 2014).

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