2011年4月15日星期五

"Evil" Dino relating to first carnivores

A new carnivorous dinosaur closes the evolutionary gap between the world's oldest dinosaur and later Jurassic dinosaur theropod species. With the name "evil spirit buck-toothed reptiles", the dinosaur had a unusual snout and teeth. The dinosaurs lived in the present-day ghost Ranch 205 million years ago, national monument, which inspired the animal spooky name.

A new "evil spirit" buck-toothed dinosaur recently excavated in New Mexico represents an evolutionary link between the world's oldest known carnivorous dinosaurs and later meat-loving Dino species from the Jurassic, according to new research.

The dinosaur, with the name of Daemonosaurus Chauliodus (evil spirit buck-toothed reptile), is described in the latest edition of the proceedings of the Royal Society b.

The dinosaurs lived in the present-day ghost Ranch 205 million years ago, national monument, which inspired the animal spooky name. During the late Triassic, this place was a dinosaur paradise, with warm weather and seasonal rainfall. The other animals there could at the time as dinosaurs, not Daemonosaurus distinctive "grin." missed such as the predatory Coelophysis Bauri

VIDEO: Fulfil fossil hunters at New Mexico's Ghost Ranch

"Daemonosaurus has an unusually short muzzle with few teeth in the maxilla and the design front large teeth in the upper jaw," head said author Hans-Dieter sues discovery messages, added, that the dinosaurs probably about four to five metres in length measured.

From a fossilized skull and neck discovered remains of the dinosaur, sues, curator of vertebrate paleontology at the Smithsonian National Museum of natural history, and his colleagues.

The scientific analysis of the remains found that the dinosaurs part of Triassic old school with some advanced features, with the later Jurassic dinosaurs.

The triad-linked Daemonosaurus include the small hole in the nose between the nostril and the eye socket. It was also more primitive bone related to the air bags of a bird-like lung system. Later, more dinosaurs was developed.

Evil spirit specialized teeth, but show that it was an advanced dinosaur than its earlier relatives. As with the time developed carnivorous dinosaurs as were the famous Tyrannosaurus Rex, longer snouts with more teeth, complex openings in the snout and limbs, the more bird-like.

The oldest known dinosaurs walked or ran on its hind legs and early carnivorous fish such as Herrerasaurus. It existed in what today Argentina and Brazil are about 230 million years ago. Some paleontologists questions due to a gap in the fossil record these early dinosaurs were bipedal carnivores, but Daemonosaurus strengthens the argument that they theropods and helps to fill in the evolutionary gap.

Although the weather good for dinosaurs in late Triassic New Mexico was, recommend the new findings this place was a Dino-eating Dino world very much.

"Daemonosaurus probably preyed on and was preyed on by the advanced Coelophysis", Suez said. "There were in addition large non-dinosaurian predators, including a large early crocodile relative and a large Phytosaurs."

Randall of Irmis, curator of paleontology at the University of Utah, told Discovery News "This discovery is interesting for several reasons." First thought long paleontologists that the only dinosaur species has been preserved in the quarry of Coelophysis Coelophysis Bauri itself; "This is the first conclusive evidence of other dinosaurs of world-famous deposit."

"Secondly," he added, "it is important because as the authors, Daimonosaurus characters, the gap between the very basal and early theropods such as Herrerasaurus and Eoraptor, and later theropods such as Tawa and Coelophysis."

All of the paleontologists form and teeth, which they say under meat-loving dinosaurs are confused by the evil spirit "unusual" skull are unique. Future research can what ecological roll show these characteristic features Daimonosaurus may have played during his lifetime.


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