The teeth of the newly described Eritreum melakeghebrekristosi are a tip-off to
its position as a missing link in the elephant family tree.
Posted on 11/02/2006 3:42:59 AM PST by Pharmboy
The teeth of the newly described Eritreum melakeghebrekristosi are a tip-off to
its position as a missing link in the elephant family tree.
ANN ARBOR, Mich.—A pig-sized, tusked creature that roamed the earth some 27 million years ago represents a missing link between the oldest known relatives of elephants and the more recent group from which modern elephants descended, an international team that includes University of Michigan paleontologist William J. Sanders has found.
The teeth of the newly described Eritreum melakeghebrekristosi are a tip-off to its position as a missing link in the elephant family tree.
The group's findings, to be published this week in the Proceedings of the National Academy of Sciences, suggest that mastodons and the ancestors of elephants originated in Africa, in contrast to mammals such as rhinos, giraffes and antelopes, which had their origins in Europe and Asia and migrated into Africa. The dating of the new fossil, discovered in the East African country of Eritrea, also pushes the origins of elephants and mastodons five million years farther into the past than previous records, Sanders said.
From 35 to 25 million years ago, representatives of the group known as proboscideans (which includes elephants, mastodons and their close relatives) lived only in Africa and Arabia, and most of them were palaeomastodonts. These animals were shorter and smaller than today's elephants, with short trunks and tusks and simple teeth that were all in place at the same time, as human adult teeth are.
After 25 million years ago, larger proboscideans such as mastodons and gomphotheres—the ancestors of modern elephants—dominated the scene. Elephant-sized, with long tusks and trunks, these advanced proboscidans had more complex teeth that emerged more slowly, so that each quadrant of the mouth had only one or two functional teeth in place at a time.
"The new fossil from Eritrea is important because it shows aspects of dental anatomy in common with the advanced group, including molars with more cusps and complex crowns and the delayed maturation and emergence of molars," said Sanders, an assistant research scientist in the U-M Museum of Paleontology. But the creature that the new fossil represents also had characteristics in common with palaeomastodonts, namely smaller body size and a jaw structure that suggests shorter tusks and trunk.
"In age and anatomy it is exactly the sort of intermediate evolutionists would expect to bridge the gap between archaic and advanced proboscideans," Sanders said.
In addition to Sanders, the research team included Jeheskel Shoshani of the University of Asmara in Eritrea and the Elephant Research Foundation in Bloomfield Hills, Mich.; Robert Walter of Franklin and Marshall College in Lancaster, Penn.; Michael Abraha and Tesfalidet Ghirmai of the Eritrean Ministry of Mines and Energy; Seife Berhe of Global Resources in Asmara, Eritrea; Pascal Tassy of the Museum National d'Histoire Naturelle in Paris; Gary Marchant of the Elephant Research Foundation; Yosief Libsekal of the National Museum of Eritrea; and Dietmar Zinner of Deutsches Primatenzentrum in Gottingen, Germany.
Sanders received financial support for participation in the project from a Scott Turner Award from the U-M Department of Geological Sciences.
Dunno, my mind reading skills aren't too strong.
That's why I said "apparently"...it fit the evidence I'm aware of. Still does, since it is a less effecive source if no one can find it.
Try prying the key off and cleaning it.
Pump your evolutionary sunshine somewhere else. I ain't bitin'.
believe:
2. to have confidence or faith in the truth of (a positive assertion, story, etc.); give credence to.
- dictionary.com
At some point you made a judgment call that the theory of evolution was an adequate explanation of the state of life in the world, that the evidence for this was overwhelming. You were not offered a mathematical proof, but based on all that you know, you "give credence to" and "have confidence in" evolution as a correct explanation.
As for Jim Robinson's actions, I find this somewhat distressing. I have always had the attitude that being on FR is sort of like being in Jim Robinson's living room. Sometimes this has caused me to not say things that he or others might find offensive. But I also felt that one of the strengths of FR has been that it was a great forum for open debate, where people are not censored or banned as long as they discuss things in a civil manner. To me one of the most attactive aspects of conservative thought is the idea that opinions must be backed up with logic and reason. If certain opinions that that are not even in any way political are no longer allowed, I'm sure some of the best people around here have already left.
I understand and agree with your definition, but there seems to be a FR and Biblical literalist limited modification that involves the absence of evidence. That's why I used quotes.
And yes, many of the best have left.
I submit that this fossil fragment is not sufficient evidence to prove the contention.
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