An amateur fossil hunter’s discovery of a 200-million-year-old fish jawbone on a Welsh beach has resolved two centuries of uncertainty regarding the origins of fossils scattered across Europe, according to palaeontologists.
The jaw was found by Jonathan Bow at Lavernock in the Vale of Glamorgan during low tide in the spring of 2012. At the time, Bow, a collector with roughly a decade of experience, was initially intrigued, believing the specimen might belong to a miniature crocodile or represent a completely new find. However, for many years, experts were unable to definitively identify the bone.
The breakthrough came in 2022 when Jacob Quinn, a lead researcher at the University of Bristol, examined Bow’s collection and subsequently investigated the jaw in detail. The analysis revealed that the fossil belonged to Saurichthys, a predatory fish that inhabited shallow tropical seas during the Late Triassic period.
This discovery has significant implications for how museums and researchers interpret fossils found around the Bristol Channel and throughout Europe. Previously, fossilized teeth from the region and elsewhere were often grouped together under the single classification of Severnichthys. The new evidence demonstrates that these collections actually represent two distinct species: Saurichthys and Birgeria.
“Many teeth from Saurichthys were once mistaken for those of an amphibian, and that misunderstanding continued well into the 20th Century,” explained Cindy Howells, a curator at Amgueddfa Cymru – Museum Wales. “This lovely little jaw caused great confusion when it was first found as it bore no resemblance to any known species.”
The collaborative study involved researchers from Amgueddfa Cymru, the State Museum of Natural History Stuttgart, and the University of Bristol. They concluded that the fossils originated from storm events that occurred 200 million years ago, making the survival of such a delicate bone remarkable.
“Although British Triassic fossils have been studied for over 200 years, this is the first bone from Saurichthys ever found in these rocks,” Quinn noted. The findings led to the publication of a scientific paper that re-examined specimens across Europe, providing clear evidence that the genus Severnichthys was redundant and consisted of overlapping species.
Co-author Dr. David Whiteside described the ancient environment as a shallow tropical sea dotted with small limestone islands. He noted that while Saurichthys was likely a fast and agile hunter, Birgeria was larger, more powerful, and fed on a wider variety of prey.
Dr. Sam Cooper, another co-author, highlighted the significance of the find: “These fish have a remarkably complicated history. It’s amazing that a single fossil, found by Jonathan Bow during a spring tide, has helped clear up nearly 200 years of confusion.”
Bow expressed satisfaction in his contribution to science, stating, “It felt good to have been part of the team that had contributed to science.” The Saurichthys jawbone will go on public display at the National Museum Cardiff later in 2026.
A storm tossed that jaw here, two hundred million years later a beach walker found it. Wild timing.