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paleontology menamakan  reptil karnivora yang mendahului dinosaurus

Ahli paleontologi sekarang me nama kan reptil karnivora panjang  9 kaki  dengan pisau steak / steak knife  - seperti gigi dan lempeng tulang di bagian belakang . Namanya adalah Nundasuchus ....read more

Paleontologist
names a carnivorous reptile that preceded dinosaurs

Date:

January 20, 2015

Source:

Virginia Tech

Summary:

Paleontologist have
now named a 9-foot-long carnivorous reptile with steak knife-like teeth and
bony plates on the back. Its name is Nundasuchus.

................

finding a new species of
dinosaur is pretty rare. Getting a hand in the discovery and naming of one --
that's rarer still.

Or it would be for anyone other than 32-year-old Sterling Nesbitt, an
assistant professor of geological sciences in the College of Science and the
newest addition to Virginia Tech's paleontology team.

Nesbitt has been responsible for naming more than half a dozen reptiles
(including dinosaurs) in his young career.

His latest addition to the paleontological vernacular isNundasuchus,
(noon-dah-suh-kis) a 9-foot-long carnivorous reptile with steak knifelike
teeth, bony plates on the back, and legs that lie under the body.

Nundasuchus is not a dinosaur, but one of the large reptiles that lived before
dinosaurs took over the world.

"The full name is actually Nundasuchus songeaensis,"
Nesbitt explained. "It's Swahili mixed with Greek."

The basic meaning of Nundasuchus, is "predator
crocodile," "Nunda" meaning predator in Swahili, and
"suchus" a reference to a crocodile in Greek.

"The 'songeaensis' comes from the town, Songea, near where we found
the bones," Nesbitt said. "The reptile itself was heavy-bodied with
limbs under its body like a dinosaur, or bird, but with bony plates on its back
like a crocodilian."

The new, albeit ancient, reptile, is featured online in the Journal
of Vertebrate Paleontology.

"We discovered the partial skeleton in 2007 when I was a graduate
student, but it took some years to piece the bones together as they were in
thousands of pieces," Nesbitt said.

Although a large number of skeleton bones were found, most of the skull was
not recovered despite three trips to the site and more than 1,000 hours spent
painstakingly piecing the bones back together and cleaning them.

Nundasuchus was found in southwestern Tanzania, while Nesbitt and a team of
researchers were looking for prehistoric relatives of birds and crocodiles, but
not really expecting to find something entirely new.

"There's such a huge gap in our understanding around the time when the
the common ancestor of birds and crocodilians was alive -- there isn't a lot
out there in the fossil record from that part of the reptile family tree,"
Nesbitt said. "This helps us fill in some gaps in reptile family tree, but
we're still studying it and figuring out the implications."

The find itself was a bit of a "eureka moment" for the team.
Nesbitt said he realized very quickly what he had found.

"Sometimes you know instantly if it's new and within about 30 seconds
of picking up this bone I knew it was a new species," he said. "I had
hoped to find a leg bone to identify it, and I thought, This is exactly why
we're here' and I looked down and there were bones everywhere. It turns out I
was standing on bones that had been weathering out of the rock for hundreds of
years -- and it was all one individual of a new species."

Nesbitt says he has been very lucky to put himself in the right position
for finding bones, but it also takes a lot of work doing research on what has
been found in various locations through previous research; what type of animals
were known to inhabit certain areas; and research into the geological maps of
areas to determine the most likely places to find fossils.

Nesbitt has been involved in naming 17 different reptiles, dinosaurs, and dinosaur
relatives in the last 10 years, including seven of which he discovered.







Story Source:

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







Journal Reference:

1.    Sterling J. Nesbitt, Christian A. Sidor,
Kenneth D. Angielczyk, Roger M. H. Smith, Linda A. Tsuji. A new
archosaur from the Manda beds (Anisian, Middle Triassic) of southern Tanzania
and its implications for character state optimizations at Archosauria and
Pseudosuchia. Journal of Vertebrate Paleontology, 2014; 34 (6):
1357 DOI: 10.1080/02724634.2014.859622

http://www.sciencedaily.com/releases/2015/01/150120085619.htm

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