doi.org/10.1080/14772019.2025.2573750
Credibility: 989
#Tainrakuasuchus
A newly discovered carnivorous reptile, which at first glance could be mistaken for a dinosaur, is actually an ancestor of modern crocodiles
Called *Tainrakuasuchus bellator*, this impressive animal lived 240 million years ago, even before the first dinosaurs, during the Triassic period.
Its name combines words from the Guarani language, “tain” (tooth) and “rakua” (pointed), with the Greek “suchus” (crocodile), referring to its sharp teeth, and “bellator,” from Latin, meaning “warrior” or “fighter.” This last part of the name is a tribute to the strength and resilience of the people of Rio Grande do Sul, especially after the recent floods that affected the state.
Measuring approximately 2.4 meters in length and weighing 60 kilograms, *Tainrakuasuchus bellator* was an agile and dominant predator in its time.
It belonged to the group of pseudosuchians, which includes the ancestors of modern crocodiles and alligators.
Unlike dinosaurs, its pelvic structure, with specific articulations in the hip and femur, clearly distinguishes it.
Equipped with a long neck and quick movements, it hunted using a thin jaw full of curved and sharp teeth, perfect for holding prey and preventing escape.
Its back was protected by bony plates, called osteoderms, similar to those found in modern crocodiles.
Although its limbs have not been preserved, scientists believe it moved on four legs, unlike some of its close relatives.
How did *Tainrakuasuchus bellator* live and hunt?
“This animal was an active predator, but despite its considerable size, it wasn’t the largest hunter in its ecosystem.
In the same region, there were giants that reached seven meters in length,” explains Dr. Rodrigo Temp Müller, a paleontologist at the Federal University of Santa Maria, Brazil, who led the research published in the *Journal of Systematic Palaeontology*.
“Pseudosuchians were a diverse group, with species capable of taking on robust prey and others specialized in capturing fast animals.
The discovery of *Tainrakuasuchus bellator* shows how these reptiles occupied different ecological roles, with varying sizes and hunting strategies.”
The discovery reveals the complexity of the Triassic ecosystem, a crucial moment in the history of life, shortly before the emergence of dinosaurs.
*Tainrakuasuchus bellator* lived in a region near a vast arid desert, the same environment where the first dinosaurs began to appear.
This indicates that, in what is now southern Brazil, reptile communities were already extremely diverse and adapted to different survival strategies.
The Discovery in Brazil
The fossils of *Tainrakuasuchus bellator* were found in May 2025, during excavations in the municipality of Dona Francisca, in southern Brazil.
Dr. Müller’s team unearthed a partial skeleton, including parts of the jaw, spine, and pelvic girdle, encased in rock.
After a meticulous preparation process in the laboratory, where the rock was carefully removed, the scientists were thrilled to realize they had found a previously unknown species.
The analysis of the fossils revealed not only anatomical characteristics but also the animal’s behavior, such as its agility in hunting and the presence of osteoderms on its back.
An Ancient Connection Between Continents
The discovery is considered extremely rare and brings new evidence about the connection between Brazil and Africa during the Triassic period, when all the continents were united in a supercontinent called Pangaea.
“Pseudosuchians are little known because fossils of some of their lineages are rare,” explains Dr. Müller.
“*Tainrakuasuchus bellator* is very close to a species found in Tanzania, called *Mandasuchus tanyauchen*.
This similarity reflects the geography of the time, when the continents were still connected, allowing animals to move freely between regions that are now separated by oceans.”
This link shows that the faunas of Brazil and Africa shared many elements in common, with intertwined evolutionary and ecological histories.
The discovery of *Tainrakuasuchus bellator* not only illuminates a key moment in the evolution of life, but also highlights the rich diversity of reptiles that inhabited southern Brazil millions of years before dinosaurs dominated the planet.
Published in 11/14/2025 09h04
Text adapted by AI (Grok) and translated via Google API in the English version. Images from public image libraries or credits in the caption. Information about DOI, author and institution can be found in the body of the article.
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