New Spinosaurus species adds evidence to old aquatic debate

A University of Chicago-led team has described Spinosaurus mirabilis as the first new Spinosaurus species named since the genus was established in 1915, based on fossils recovered in Niger and published in Science on February 19, 2026. The animal stood out for a large, scimitar-shaped skull crest and for where it lived: an inland river system in what is now the central Sahara, not a coastal marine setting. Coverage from the University of Chicago, the Natural History Museum in London, and National Geographic all frame the find as a meaningful addition to a long-running debate over how spinosaurids lived, hunted, and moved through water. (biologicalsciences.uchicago.edu)

Why it matters: For veterinary professionals, especially those interested in comparative anatomy, physiology, and evolution, the discovery is a reminder that fossil interpretation changes as new specimens fill in missing anatomy. Researchers say the new species helps clarify variation within Spinosaurus and may support the idea that some late spinosaurids were specialized shallow-water predators rather than fully aquatic pursuit swimmers. That kind of refinement matters well beyond paleontology, because veterinary scientists increasingly use living animals to test ideas about locomotion, respiration, feeding biomechanics, and ecological adaptation in extinct species. (biologicalsciences.uchicago.edu)

What to watch: Expect follow-on debate over whether S. mirabilis settles, or simply sharpens, the question of how aquatic Spinosaurus really was. (nationalgeographic.com)