Australia's new armoured dinosaur revealed

December 8, 2015
Life reconstruction of Kunbarrasaurus ieversi. Credit: Australian Geographic

It has a parrot-like beak, bones in its skin and an inner ear similar to a turtle. Meet Kunbarrasaurus, Australia's newest dinosaur.

The skeleton of Kunbarrasaurus (koon-ba-rah-sore-rus) was discovered in 1989, but new research from a team led by University of Queensland experts has revealed the dinosaur is a distinctly different species than previously thought.

UQ School of Biological Sciences PhD student Lucy Leahey said the fossil represented the most complete dinosaur so far discovered in Australia and one of the best-preserved ankylosaur fossils in the world.

"Ankylosaurs were a group of four-legged, herbivorous dinosaurs, closely related to stegosaurs," Ms Leahey said.

"Like crocodiles, they had bones in their skin and are commonly referred to as 'armoured' dinosaurs."

"When it was first studied back in the 1990s, the fossil was placed it in the same genus as Australia's only other named ankylosaur, Minmi, which is based on some bones from Roma in south-western Queensland."

The team's research found the fossil was different to the Roma Minmi, and distinct enough from all other ankylosaurs to warrant a new name.

"Kunbarra is the word for 'shield' in the Mayi language of the Wunumara people from the Richmond area, and the species name honours the person who originally found the fossil, Mr Ian Ievers. It means 'Ievers' shield lizard," Ms Leahey said.

Research that started in 2007 involved careful preparation of the palate of the dinosaur at the Denver Museum of Nature and Science, along with CT scanning at the Mater Adult Hospital.

Lucy Leahey working on the holotype skeleton of Kunbarrasaurus ieversi. Credit: Steve Salisbury.

Professor Lawrence Witmer from the Ohio University Heritage College of Osteopathic Medicine used the information to create a 3D reconstruction of the brain, inner ear and nasal cavities, which can be viewed here.

"The CT reconstruction revealed that Kunbarrasaurus had a more complicated airway than other dinosaurs, but less so than ankylosaurs from the Northern Hemisphere," Professor Witmer said.

"The inner ear is proportionately enormous and unlike anything we have seen before in a dinosaur.

"It looks more like the inner ear of a Tuatara or a turtle. Exactly what the consequences of this are we are still unsure."

UQ's Dr Steve Salisbury said the findings made it clear that the Kunbarrasaurus specimen should be considered as a new dinosaur.

Lucy Leahey (right) and Rob Ievers (middle) and at the site where the skeleton of Kunbarrasaurus ieversi was discovered on Marathon Station, near Richmond, north-western Queensland. Credit: Lucy Leahey.

"The sheep-sized herbivore formerly known as Minmi sp. is now known to have had a parrot-like beak, breathed through a nasal passage that looped back on itself, and had an more like a tuatara than a dinosaur," he said.

"Our work has also revealed that Kunbarrasaurus is more primitive than the majority of other well-known ankylosaurs from North America and Asia."

"It appears to represent an early, less heavily 'armoured' member of the group, close to the point at which the ankylosaurs diverged from the other main lineage of armoured , the stegosaurs."

The holotype skeleton of Kunbarrasaurus ieversi (QM F18101), Australia’s most complete dinosaur fossil, and one of the world’s most complete ankylosaurians. Credit: Anthony O’Toole and Lucy Leahey

The skeleton of Kunbarrasaurus ieversi is on display at the Queensland Museum (Southbank).

The research is available online in the open access journal PeerJ.

Explore further: Rare fossil of a horned dinosaur found from 'lost continent'

More information: Leahey LG, et al. Cranial osteology of the ankylosaurian dinosaur formerly known as Minmi sp. (Ornithischia: Thyreophora) from the Lower Cretaceous Allaru Mudstone of Richmond, Queensland, Australia. PeerJ 3:e1475

Related Stories

'Lightning Claw' dinosaur identified in Australia

September 14, 2015

(—A team of researchers from Italy and Australia has identified the fossilized remains of a previously unknown megaraptorid dinosaur—they've called it "Lightning Claw" after the large claw it sports and in honor ...

Four dinosaur species identified

May 8, 2013

Just when dinosaur researchers thought they had a thorough knowledge of ankylosaurs, a family of squat, armour plated, plant eaters, along comes University of Alberta graduate student, Victoria Arbour.

Thighbone of giant dinosaur revealed

November 12, 2015

The DST_NRF Centre of Excellence in Paleosciences and the Evolutionary Studies Institute (ESI) at Wits University revealed its latest dinosaur find yesterday, 10 November 2015 at the Origins Centre.

Recommended for you

New paper answers causation conundrum

November 17, 2017

In a new paper published in a special issue of the Philosophical Transactions of the Royal Society A, SFI Professor Jessica Flack offers a practical answer to one of the most significant, and most confused questions in evolutionary ...

Chance discovery of forgotten 1960s 'preprint' experiment

November 16, 2017

For years, scientists have complained that it can take months or even years for a scientific discovery to be published, because of the slowness of peer review. To cut through this problem, researchers in physics and mathematics ...


Adjust slider to filter visible comments by rank

Display comments: newest first

1 / 5 (1) Dec 08, 2015
And so descended the turtles into the land of the living. . . . .
1 / 5 (1) Dec 08, 2015
And so descended the turtles into the land of the living. . . . .

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.