Unearthed in 1958 by a young fossil hunter in Albion, Brisbane, Queensland, Australia, dinosaur footprints have been officially recognized as the continent’s oldest, dating back approximately 230 million years to the late Triassic period. This discovery indicates that dinosaurs inhabited the Brisbane region far earlier than previously thought by paleontologists.
Living fossils unearthed from Petrie Quarry, Albion, Brisbane, Queensland, Australia. Image credit: Anthony Romilio & Bruce Runnegar, doi: 10.1080/03115518.2025.2607630.
The 18.5 cm (7 in.) long dinosaur footprint was discovered at Petrie’s Quarry, part of the Aspley Formation, alongside a slab featuring narrow linear grooves interpreted as possible tail traces.
Both specimens were extracted before the quarry site was redeveloped, passing through several university collections since then.
“This is the only dinosaur fossil discovered in an Australian capital, highlighting how significant finds can remain hidden in plain sight,” stated Dr. Anthony Romilio, a palaeontologist from the University of Queensland.
“Urban development has rendered the original site inaccessible, leaving behind these footprints as the only evidence of dinosaurs in the area.”
The footprints show impressions of three forward-facing toes, with the central toe demonstrating a faint fan-shaped outline, characteristics typical of a bipedal dinosaur.
Advanced 3D modeling and morphometric analysis revealed that this footprint closely resembles the Ichnogenus Evazoum, commonly linked to early sauropod dinosaurs found elsewhere.
Based on the dimensions of the footprints, Dr. Romilio and Professor Bruce Rannegar estimated that the corresponding dinosaur stood about 78 centimeters (31 inches) tall at the waist and weighed around 144 kilograms (89 pounds).
Utilizing established scaling equations, researchers calculated the maximum potential running speed to be about 60 km/h (37 mph).
While no dinosaur skeletons have been found in the Aspley Formation, these footprints serve as the only direct evidence of dinosaur presence in this time and place.
“Dinosaurs may have walked along waterways, leaving their tracks preserved in sandstone that was later cut to build structures across Brisbane,” Dr. Romilio explained.
“If not for the foresight to conserve this material, the history of Brisbane’s dinosaurs would have remained completely unknown.”
“These footprints were made in sediment by large animals and exemplify a unique kind of trace fossil,” stated Professor Rannegar.
The associated tail print, approximately 13 centimeters (5 inches) long, aligns with structures interpreted as a dinosaur’s tail track. However, the authors caution that without preservation of the corresponding footprint in an appropriate location, its origin remains uncertain.
“The shallow linear grooves found in the tail block closely match reported tail drag traces, yet lack any remaining evidence of Manus or Pes. Their true identity remains ambiguous,” they noted.
“These grooves could have resulted from caudal contact in the orbits of prosauropods, but typically on-site and near the midline of such orbit, which isn’t applicable in this case.”
The team’s research paper has been published this week in The Alcheringa, Australian Journal of Paleontology.
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Anthony Romilio and Bruce Rannegar. Australia’s oldest dinosaur: Reproductive fossils unearthed from the Carnian Aspley Formation in Brisbane, Queensland, Australia. Alcheringa published online on February 1, 2026. doi: 10.1080/03115518.2025.2607630
Source: www.sci.news
