Australian tyrannosaur discovered


This video is called Planet Dinosaur – Documentary 2015 BBC Planet Dinosaur Ep 1 2 3 [BBC Documentary Full Movie].

From Scientific American:

Mar 25, 2010 02:01 PM

New Australian dinosaur fossil shows that tyrannosaurs‘s range was global

By Katherine Harmon

Tyrannosaur bones are relatively familiar finds on the northern continents of the globe, cropping up everywhere from modern-day Colorado to China. But until now, they appeared to be oddly missing from the southern half of the globe. The discovery of a distinctively tyrannosaur-like hipbone in Victoria, Australia, however, might change the way scientists think about the distribution—and evolution—of this infamous group of dinosaurs.

“The absence of tyrannosauroids from the southern continents was becoming more and more anomalous as representatives of other ‘northern’ dinosaur groups started to show up in the south,” Paul Barrett, of the Department of Paleontology at the Natural History Museum in London and a coauthor of the new report, said in a prepared statement.

The hipbone fossil is 30 centimeters long. “The bone is unambiguously identifiable as a tyrannosaur because these dinosaurs have very distinctive hip bones,” asserted lead study author Roger Benson, of the Department of Earth Sciences at the University of Cambridge, in a prepared statement.

Extrapolating from the size of the hipbone, the researchers estimate that the new tyrannosaur would have been about the size of a person, measuring some three meters long and weighing in at about 80 kilograms. The animal lived in the Early Cretaceous, when members of the family were still small compared to the towering, Late Cretaceous Tyrannosaurus rex.

This as-yet unnamed dinosaur lived about 110 million years ago—about 40 million years before its revered relative the T. rex. At this time, the southern continents (Australia, Africa, South America and Antarctica) were still connected to each other, providing the researchers with “hints at the possibilities that others remain to be discovered in Africa, South America and India,” Barrett said. The fossil find was detailed online on March 25 in Science.

Why did this group of dinosaurs appear to be so small and scant in the southern hemisphere while some tyrannosaurs later on were massive, dominating predators in the northern hemisphere? “It is difficult to explain why different groups succeeded in the north and south if they originally existed in both places,” Benson said. “We can only answer these questions with new discoveries.”

See also here. And here. And here. And here.

Tyrannosaurs plodded like elephants: here.

How did dinosaurs endure up to six months of cold and total darkness? Fossils from Australia are telling the strange story of polar dinosaurs: here.

Discoveries of Australian dinosaurs add fuel to the fiery debate about whether they were warm- or cold-blooded creatures: here.

From killers of the freezing Antarctic wastes to titanic herbivores, Australian dinos are being dug up in great numbers: here.

A 120-MILLION-YEAR-OLD dinosaur footprint was among a series of fossils illegally removed from a sacred Aboriginal site in Broome, WA in the mid-90s. The footprint was recovered on 30 December 1998, its thief charged thereafter, while another invaluable fossil remains missing and shrouded in mystery: here.

Caltech-led team first to directly measure body temperatures of extinct vertebrates: here.

6 thoughts on “Australian tyrannosaur discovered

  1. Walking with dinosaurs on Victoria’s Jurassic Coast a prehistoric paradise

    Bridie Smith

    December 4, 2010

    WALK the windswept Bass Coast around Inverloch and you are literally walking with dinosaurs. Three-toed footprints the size of dinner plates are imprinted into the rocky shore platform and some of the country’s most significant dinosaur fossils have been discovered here.

    Fossilised tree stumps are exposed at low tide – evidence that this potholed shoreline with its pounding sea soundtrack was once covered with pine forests and ornate braided river systems prone to flooding.

    When dinosaurs were king 120 million years ago, a valley that is now the Bass Coast connected Australia with Antarctica and was so far south it was blanketed in darkness for up to three months of the year.
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    An artists impression of the same region with a reconstruction of what the Qantassaurus might have looked like. Artist: Peter Trusler.

    An artists impression of the same region with a reconstruction of what the Qantassaurus might have looked like. Artist: Peter Trusler.

    And while the 40 kilometre coastline between Inverloch and San Remo is renowned as a palaeontologist’s paradise, it takes a trained eye to spot its prehistoric riches.

    But experts hope that will change with Dinosaur Dreaming, a book detailing the coastline’s scientific wealth, which has just been published.

    The book’s release coincides with the latest discovery – the first intact dinosaur skeleton to be found on the Bass Coast. The rare specimen, found by geologist Mike Cleeland on the Inverloch foreshore, is believed to be a small ornithopod or plant-eating dinosaur. The size of its well-preserved skull suggests it was a juvenile and experts are keenly awaiting the results of the preparatory work under way at Museum Victoria as they try to establish which dinosaur genus it belongs to.

    ”This is the first evidence of a dinosaur skeleton on this coast, so it’s very significant,” said Dinosaur Dreaming editor Lesley Kool. ”And where there’s one, there could be more.” For decades the area has been a happy hunting ground for palaeontologists including Tim Flannery who, in 1978 alone, uncovered more than 30 fossil bones with his university friend John Long.

    The pair picked the coastline around Eagle’s Nest because it was where a fossilised claw of a meat-eating dinosaur was found in 1903 – the first evidence that dinosaurs once inhabited Australia.

    The area is also one of the few places in the world where polar dinosaur remains have been found, according to Monash University palaeontologist Patricia Vickers-Rich.

    Over decades fossils have been recovered indicating at least five different types of dinosaurs called the area home, including the wallaby-sized Qantassaurus and the armoured Ankylosaur.

    The coastline’s rock has also preserved bones and teeth belonging to prehistoric mammals, birds, sea life and insects indicating the domain of the dinosaurs was hugely diverse.

    For Ms Kool, a fossil preparator from Monash University, no fossil is too small to generate a surge of excitement when found. In some cases the smallest remnants of a dinosaur can reveal a wealth of information.

    ”The single bones we find can be very diagnostic,” she said.

    ”Teeth can reveal the size and shape of the animal and we can tell whether [they are] a plant or a meat-eater.”

    And despite the attention the area has received from dinosaur prospectors, it is not about to be exhausted of its prehistoric prizes. ”It’s as rich today as it was when we first started in 1991,” she said.

    Ms Kool said the coastline was constantly being eroded by sand and surf, which exposed new fossils.

    Annual summer digs of the Flat Rocks site began in 1994 and have continued each year since, with an average haul of 700 fossil bones and teeth collected from each field trip.

    ”This site contains the highest concentration of bones at any site along the south coast of Victoria, producing more specimens than Dinosaur Cove (near the Otway Ranges) and all the other sites put together,” Ms Kool said. ”It’s hugely significant.”

    http://www.theage.com.au/victoria/walking-with-dinosaurs-on-victorias-jurassic-coast-a-prehistoric-paradise-20101203-18jww.html

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