Scientists have discovered the first evidence of a huge carnivorous dinosaur, four times the size of a lion, that roamed southern Africa 200 million years ago.
Researchers, including those from University of Cape Town in South Africa, have found several three-toed footprints measuring 57 centimeters long and 50 centimeters wide.
This means the dinosaur would have an estimated body length of around nine meters and be a little less than three meters tall at the hip, researchers said.
That is four times the size of a lion, which is currently the largest carnivore in southern Africa, they said.
The footprints belong to a new species, named Kayentapus ambrokholohali, which is part of the group of dinosaurs called “megatheropod”.
The term “megatheropods” describes the giant two-legged carnivorous dinosaur, such as the iconic Tyrannosaurus rex (T rex) which fossil evidence shows was around 12 meters long.
The study, published in the journal PLOS ONE, also reveals that these footprints make up the largest theropod tracks in Africa.
The tracks were found on an ancient land surface, known as a palaeosurface, in the Maseru District of Lesotho, a small country in southern Africa.
The surface is covered in 200 million year old ‘current- ripple marks’ and ‘desiccation cracks’ which are signs of a prehistoric watering hole or river bank.
“The latest discovery is very exciting and sheds new light on the kind of carnivore that roamed what is now southern Africa,” said Fabien Knoll, Senior Research Fellow at The University of Manchester in the UK.
What makes the discovery even more important is that these footprints date back to the Early Jurassic epoch, when it was thought the size of most theropod dinosaurs was considerably smaller, researchers said.
On average they were previously thought to be around three to five meters in body length, with some records showing they may have reached seven meters at the very most, they said.
It is only much later in the Jurassic and during the Cretaceous, which starts 145 million years ago, that truly large forms of theropods, such as T rex, appear in body and trace fossil records.