A remarkable discovery in the central Sahara Desert has revealed a new species of dinosaur, Spinosaurus mirabilis, a fish-eating giant that roamed the region approximately 95 million years ago. The find, led by a team from the University of Chicago, marks the first new spinosaurid species identified in over a century and challenges previous assumptions about the dinosaur’s habitat. This ancient predator, nicknamed the “hell-heron” by researchers, offers a fascinating glimpse into a previously unknown chapter of dinosaur evolution.
The initial discovery in 2019 involved a large, scimitar-shaped bone unearthed from the desolate sands of Niger. It wasn’t immediately clear what the bone represented, prompting a return expedition in 2022. Further excavation yielded two more crests, ultimately leading to a 3D digital reconstruction of the skull powered by solar panels in the remote desert environment. The resulting image confirmed the team’s suspicions: they had uncovered a completely new species of dinosaur, distinct from previously known spinosaurids.
A Unique Predator: Anatomy of Spinosaurus mirabilis
Spinosaurus mirabilis was a large predator specifically adapted for a fish-based diet. Researchers believe a prominent crest on its skull was covered in keratin and brightly colored during its lifetime, serving as a visual signal. According to the University of Chicago, the crest curved towards the sky like a “blade-shaped beacon.” A defining characteristic of this species, and spinosaurids in general, is its interlocking teeth. The teeth of the lower jaw protruded outward, fitting between those of the upper jaw, creating a specialized trap for capturing slippery fish – an adaptation also seen in ancient ichthyosaurs, crocodiles, and pterosaurs. The University of Chicago News details these unique dental features.
Previously, spinosaurid fossils were largely found in coastal sedimentary deposits, leading to the hypothesis that these theropods were primarily aquatic, hunting in the water. But, the discovery of S. Mirabilis in the central Sahara, near the remains of a long-necked dinosaur buried in river sediments, suggests a different habitat. Professor Paul Sereno, who led the expedition, envisions the dinosaur as being comfortable wading in water up to two meters deep, but likely spending much of its time ambushing prey in shallow waters. “I imagine this dinosaur as a sort of ‘hell-heron’ that wouldn’t have trouble wading in two meters of water on its sturdy legs, but probably spent much of its time lurking in shallow waters to trap the large fish of the time,” CBS News reports Sereno as saying.
Following a Decades-Old Clue
The expedition’s origins trace back to a single line in a 1950s French geological monograph. Hugues Faure, a French geologist, documented finding a single saber-shaped tooth at a location he labeled “Akarazeras” in the central Sahara. Although the tooth was never photographed or figured, Faure correctly identified its potential age. For over 70 years, no paleontologist returned to the site. Sereno, inspired by this decades-old clue, finally launched an expedition in 2019, guided by a local Tuareg man who remembered a location with large fossil bones. The Conversation details the journey inspired by Faure’s initial discovery.
Sereno’s team has a long history of perform in the Sahara, having excavated over 100 tons of fossils over the past 30 years. He is also the founder of the River Museum in Nigeria, a pioneering energy-free museum dedicated to documenting African dinosaurs. The fossils recovered from the S. Mirabilis site were transported to the South Side Fossil Lab at Washington Park in Chicago, where they underwent cleaning, CT scanning, and digital reconstruction.
A replica of the Spinosaurus mirabilis skull, complete with a colorful, blade-shaped crest, is slated for display at the Dinosaur Expedition exhibit at the Chicago Children’s Museum, offering a unique opportunity for students to engage with this remarkable discovery. Sereno emphasized the importance of inspiring the next generation of scientists, stating, “Letting kids experience the thrill of new discoveries is key to ensuring the next generation of scientists will find out more about our precious planet and develop it worth preserving.”
The research, published February 19, 2026, in the journal Science under the title “Scimitar-crested Spinosaurus species from the Sahara caps stepwise spinosaurid radiation,” provides valuable insights into the evolution of spinosaurids and their adaptation to diverse environments. Further research will undoubtedly continue to refine our understanding of this fascinating predator and its place in the prehistoric world.
This discovery underscores the importance of continued paleontological exploration, even in seemingly well-studied regions. The Sahara Desert continues to yield remarkable insights into the history of life on Earth. Share your thoughts on this incredible find in the comments below.
Disclaimer: This article provides information about a scientific discovery and is intended for educational purposes only. This proves not intended to provide medical or scientific advice.
