First New Spinosaurus in a Century Stuns Researchers (Image Credits: Media-cldnry.s-nbcnews.com)
Niger – Paleontologists uncovered fossils of a massive new dinosaur in the remote central Sahara, reshaping views on one of the largest carnivorous species ever known.[1][2]
First New Spinosaurus in a Century Stuns Researchers
Expedition teams stumbled upon the extraordinary remains during grueling treks into the sand seas. In 2019, a local Tuareg guide led scientists to the Jenguebi site, where a towering scimitar-shaped crest first appeared on the surface. The group returned in 2022 with 20 members, hauling back over 55 tons of specimens under harsh desert conditions.[1]
Paul Sereno, a University of Chicago paleontologist, described the moment of realization as emotional. Team members assembled a 3D digital skull model using solar power right in camp. This marked the first new Spinosaurus species identified in more than 100 years, since Spinosaurus aegyptiacus surfaced in Egypt in 1915.[3]
Anatomy Built for Shallow-Water Domination
The creature, named Spinosaurus mirabilis or “astonishing spine lizard,” boasted a blade-like head crest up to 20 inches tall. This scimitar-shaped feature, likely sheathed in colorful keratin, projected dramatically above the skull roof. Jaws featured interlocking conical teeth that formed a perfect trap for slippery prey, with lower teeth protruding between upper ones.[2]
Sturdy hind legs supported a frame roughly 40 feet long and weighing 5 to 7 tons. Retracted nostrils allowed the snout to submerge while the animal breathed above water. A sail-like structure along the back echoed its famous relative, though this inland dweller showed distinct adaptations.[4]
- Scimitar crest for display or recognition.
- Interdigitating teeth optimized for fish.
- Elongated snout with spaced posterior teeth.
- Low-profile skull and robust legs for wading.
- Sail-backed body for semiaquatic life.
Stalking Prey in Cretaceous Rivers
About 95 million years ago, during the Cenomanian stage, S. mirabilis prowled forested inland basins crisscrossed by rivers. Fossils lay in fluvial sediments alongside long-necked sauropods, hundreds of miles from ancient shorelines. This giant waded into waters up to two meters deep, ambushing sizable fish like coelacanths.
Sereno envisioned it as a “hell heron,” spending most time in shallows to snare prey. Co-author Daniel Vidal noted its extreme piscivorous traits made it superior at fish hunting over terrestrial pursuits. The setup refuted ideas of fully aquatic spinosaurids, positioning it as a wading ambush specialist.[2]
Closing Chapter of a Dinosaur Dynasty
The find outlined three phases in spinosaurid evolution: Jurassic origins with fish-snaring skulls, Early Cretaceous dominance around the Tethys Sea, and a final Late Cretaceous peak in northern Africa and South America. S. mirabilis capped this radiation before sea level rise and climate shifts ended the line around 95 million years ago.
Principal component analysis placed its body between heron-like waders and divers, far from other theropods. Inland discoveries challenged coastal biases from prior fossils. The paper in Science highlighted visual signaling via crests, akin to modern birds.[3]
Key Takeaways
- First Spinosaurus species in over a century, from remote Niger site.
- Semiaquatic wader with unique scimitar crest and fish-trap teeth.
- Reveals inland habitats, debunking fully aquatic theories.
This “hell heron” underscores the Sahara’s untapped fossil wealth and spinosaurids’ diverse adaptations. As replicas head to museums, the discovery invites fresh questions about Cretaceous predators. What secrets still hide in those ancient riverbeds? Share your thoughts in the comments.
