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|Topic Started: Jan 8 2012, 01:59 PM (599 Views)|
|Taipan||Jan 8 2012, 01:59 PM Post #1|
Fossil range: Late Triassic
Species: Prestosuchus chiniquensis
Prestosuchus is an extinct genus of a group of rauisuchians called prestosuchids. Like its prestosuchid cousins, Prestosuchus had a deep skull and serrated teeth. Prestosuchus lived in Brazil of the Late Triassic Period. It reached lengths of nearly 5 metres. While it resembled a dinosaur in having a large body and upright posture it was actually a rauisuchian archosaur. It was an ambush predator and may have hunted smaller animals like Hyperodapedon. Prestosuchus had powerful legs that indicate it was a fast runner. Its closest relatives are Saurosuchus and Postosuchus.
Prestosuchus chiniquensis was first discovered in the Paleontological Site Chiniquá, near the city of São Pedro do Sul in 1938, by the German paleontologist Friedrich von Huene on a trip to Brazil. This site is located in the geopark of Paleorrota. A remarkably complete skeleton, with a well-preserved hind leg, was discovered at Dona Francisca in Rio Grande do Sul by a team of paleontologists from the Universidade Luterana do Brasil and published in 2010.
World's most complete fossil of pre-dinosaur predator discovered
By Claire Bates
Last updated at 10:32 PM on 13th May 2010
Brazilian paleontologists have found the near complete fossil of a fearsome predator that roamed the Earth before the dinosaurs.
The 22ft long creature, called Prestosuchus chiniquensis, lived some 238 million years ago. It belonged to a family of reptiles called thecodonts and had a large, deep skull with serrated teeth and a long tail.
This Prestosuchus chiniquensis fossil is the most complete one ever found. The 900lb predator was a relation of the crocodile
Weighing 900lbs, the carnivores romated Earth during the Triassic Period 250 to 205 million years ago. Dinosaurs came to dominate from 230 million years ago up to their extinction 65 million years ago.
The well-preserved creature was found by a team from the Lutheran University of Brazil, in the town of Dona Francisca 160miles from Porto Alegre.
'It is something that we could never imagine - the quality of preservation and the size of the fossils are sensational,' Professor Da Silva said.
He added: 'They were amazing predators. This discovery will allow a better understanding of the anatomy of Prestosuchus and will facilitate a more precise reconstruction of the skeleton of the animal.'
Two paleontologists evaluate the exposed part of the extraordinary fossil. They hope it will remain in Brazil where it was found
It is also the first find that includes a well preserved hind leg, which will help scientists work out how these ancient creatures moved. The Prestosuchus was first discovered in Brazil in 1938 by a visiting German paleontologist called Friedrich von Huene.
The remains were found in a sedimentary rock formation, which was a lake millions of years ago.
Paleontologists believe that herbivore creatures stopped to drink at the site and were ambushed by carnivores such as the Prestosuchus.
The team will now evaluate the exposed part of the animal over the next two years. They want to keep the creature, which was a close relative of the crocodile, in Brazil.
Read more: http://www.dailymail.co.uk/sciencetech/article-1278021/Prestosuchus-chiniquensis-Fearsome-predator-roamed-Earth-dinosaurs-discovered.html?ITO=1490##ixzz0oNDeBkNo
(article from Blackstar)
|Temnospondyl||Jun 1 2012, 03:40 PM Post #2|
Prestosuchus chiniquensis (von Huene 1942) Late Triass ~ 220 mya, 4-5 m long, was derived from a sister to Batrachotomus and phylogenetically preceded Saurosuchus and Postosuchus within the Rauisuchidae.
Distinct from Batrachotomus, the skull of Prestosuchus has a more slit like antorbital fenestra and an expanded fossa along with a deeper maxilla and larger teeth. The naris was more slit-like. The orbit was smaller and raised above the rostrum. The mandibular fenestra was smaller and the mandible was deeper.
The neural spines were shorter. The torso was relatively longer. The tail was smaller. Only three or four sacrals were located between the ilia.
The forelimb was relatively more robust.
The pubis was more robust and angled ventrally at mid length. The foot was smaller and quite similar to that of Erythrosuchus in having stout metatarsals and distally smaller phalanges terminating in tiny unguals.
With a longer torso and shorter toes, the ability to rise bipedally was greatly reduced.
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|theropod||Jul 10 2012, 06:52 PM Post #3|
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