New Study Reveals Unique Anatomy of Australian Dinosaur Muttaburrasaurus langdoni

A new scientific study has identified previously unknown cranial features in the ornithopod dinosaur Muttaburrasaurus langdoni, including teeth at the tip of its snout and anatomical structures suggesting a strong sense of smell and bipedal capability. The research, conducted by paleontologists from the University of New England, Flinders University, and the Australian Nuclear Science and Technology Organisation (ANSTO), was published in the journal PeerJ.

Key Anatomical Findings

The analysis of skull specimens revealed several distinctive characteristics.

The dinosaur's snout contained teeth at its tip, a feature not present in many other large herbivorous dinosaurs like Iguanodon or hadrosaurs.

The dinosaur's characteristic bulbous nose is composed of unique bones not found in other dinosaurs. These bones form two large air chambers. The study notes the dinosaur's olfactory bulbs, the brain region for processing smell, are among the largest recorded for any dinosaur.

Analysis of the skull's brain imprint and inner ear structure suggests the dinosaur was capable of walking on its hind legs. Researchers report this structure is more similar to bipedal dinosaurs than to quadrupedal ones.

Research Methodology and Background

The findings are based on the examination of a Muttaburrasaurus langdoni specimen. Researchers used advanced imaging techniques including CT scanning, neutron scattering, and synchrotron radiation to create detailed 3D digital models of the skull's internal structures.

Muttaburrasaurus langdoni lived approximately 96 million years ago during the mid-Cretaceous period in what is now Australia, near the ancient Eromanga Sea. The holotype specimen was discovered in 1963 near Muttaburra, Queensland. It is considered one of the most complete ornithopod skeletons from the ancient supercontinent Gondwana and is the official fossil emblem of Queensland.

Researcher Statements

The study's authors provided context for the findings in statements accompanying the research publication.

Dr. Matthew Herne stated the discovery redefines previous assumptions about the species and that the toothed beak suggests it was likely a selective feeder.

Dr. Herne also noted the nasal structures indicate a very acute sense of smell, which may have been used for finding food, detecting predators, or navigation.

Professor Vera Weisbecker reported that the inner ear structure suggests Muttaburrasaurus langdoni could walk and run on its hind legs when needed, noting a resemblance to bipedal dinosaurs like Tyrannosaurus rex.

Dr. Joseph Bevitt stated that the advanced imaging technologies were crucial for creating the detailed 3D models used in the analysis.