Please turn on JavaScript. Media requires JavaScript to play. Australian palaeontologists say they have discovered three new dinosaur species after examining fossils dug up in Queensland. Writing in the journal PLoS One, they describe one of the creatures as a fearsome predator with three large slashing claws on each hand. The other two were herbivores: one a tall giraffe-like creature, the other of stocky build like a hippopotamus. The fossils date back nearly 100 million years. They were found in rocks known as the Winton Formation. The dinosaurs have been named after characters in Australia's famous song Waltzing Matilda. The carnivore, which has the scientific classification Australovenator wintonensis, has therefore been dubbed "Banjo" after Banjo Patterson, who composed the song in Winton in 1885. Queensland Museum palaeontologist Scott Hucknell said the creature would have been a terrifying prospect. "The cheetah of his time, Banjo was light and agile. He could run down most prey with ease over open ground," he told reporters. FROM BBC WORLD SERVICE Please turn on JavaScript. Media requires JavaScript to play.
More from BBC World Service The two plant-eating, four-legged sauropod species are new types of titanosaurs - the largest animals ever to walk the Earth. "Clancy" (scientific name: Witonotitan wattsi) was a tall slender animal, while Matilda (Diamantinasaurus matildae) was more stocky and hippo-like. Banjo and Matilda - possibly predator and his prey - were found buried together in a 98-million-year-old billabong, or stagnant pond. A comparison of all three: "Matilda" (L), "Clancy" (C) and "Banjo" (R)
The findings have been published in the public access journal Public Library of Science One (PLoS One), and were announced by Queensland Premier Anna Bligh at the Australian Age of Dinosaurs Museum of Natural History in Winton. She said the discoveries were a major breakthrough in the scientific understanding of prehistoric life in Australia. Museum Victoria palaeontologist John Long described the fossils as "amazing". The Sydney Morning Herald newspaper quoted him as saying that the creatures put Australia back on the international map of big dinosaur discoveries for the first time since 1981, when the unearthing of Muttaburrasaurus, a large four-legged herbivore that could rear up on two legs, was announced. The new species will be part of the Australian Age of Dinosaurs Museum of Natural History under construction in Winton. It should be completed in 2015.
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Scientists in Queensland, Australia have discovered three new species of dinosaur in the mid-Cretaceous Winton Formation. The find has been published in the 2009 online journal ''PLoS ONE'' by Queensland Museum palaeontologist, Scott Hocknull ''et al.''
Winton, Queensland, Australia 
Skeletal remains of two giant (titanosauriform) herbivorous sauropods along with one lightweight carnivorous theropod were found.

''Diamantinasaurus matildae'' (meaning "Matilda's Diamantina River Lizard") derives its name from the Diamantina River which meanders through Queensland, Australia, and the Greek word ''sauros'', which means lizard.  The name ''matildae'' honours a national song of Australia, "Waltzing Matilda" penned by poet and writer A.B. "Banjo" Patterson whilst visiting near the town of Winton.  ''Diamantinasaurus'' was a very large and heavy lithostrotian sauropod which has been compared to a gigantic modern-day hippopotamus.
The discoverers' impression of ''Diamantinasaurus''
''Wintonotitan wattsi'' was named firstly for the town of Winton, followed by Titan, a giant in Greek mythology.  ''Wattsi'' honours Keith Watts, the original person who discovered the bones and donated them to Queensland Museum back in 1974. This plant-eating, tall, basal sauropod was nicknamed "Clancy" and has been said to resemble a present-day giraffe.
 A reconstruction of ''Australovenator'', showing known fossils.
''Australovenator wintonensis'' (meaning "Winton's Australian hunter") is named after Australia (from Latin ''Australis''), and ''venator'', the Latin word for hunter. The name ''wintonensis'' again means from the town of Winton. This allosauroid was nicknamed "Banjo".  "The cheetah of his time, Banjo was light and agile. He could run down most prey with ease over open ground," said Hucknell. “He’s Australia's answer to ''Velociraptor'', but many times bigger and more terrifying.”

"Banjo" and "Matilda" were both found entangled together in a 98- to 95-million-year-old billabong.

Anna Bligh, Premier of Queensland, was called upon to unveil the fossil remains on July 3 at the Australian Age of Dinosaurs Museum of Natural History.

“The Australian Age of Dinosaurs Museum and Queensland Museum have successfully partnered to uncover this greatest concentration of dinosaur bones ever found in Australia,” said Bligh. “This State Government-funded initiative has revealed to the world the first new sauropods to be named in Australia in over 75 years, and the most complete carnivorous dinosaur skeleton ever found in our country.”