Time to learn a new dinosaur species’ name discovered by Hungarian researchers

Hungarian palaeontologists have identified a new plant-eating “duck-billed” dinosaur species, based on fossils excavated in the Hațeg Basin. The discovery is notable not only because it adds a new species to Europe’s Late Cretaceous record, but also because the team managed to recover a rare, associated partial skeleton – a type of find that is exceptionally uncommon in this region and often the key to making a confident identification.

The researchers say the new species strengthens the idea that the so-called “Hațeg Island” ecosystem – a prehistoric island environment that existed roughly 70 million years ago near the end of the Cretaceous – was more diverse than previously assumed.

Years of fieldwork and thousands of fossils

The excavation programme has been running since 2019, led by researchers from Eötvös Loránd University (ELTE), the Hungarian Natural History Museum (MNMKK), the Supervisory Authority for Regulated Activities (SZTFH) and the University of Bucharest. Their work focuses on sites near the small settlement of Valiora, where palaeontologists have uncovered multiple fossil-bearing localities.

Over the years, the team has collected several thousand bones dated to the end of the Cretaceous, building a growing picture of the vertebrate fauna that once lived in the area. Among the most common dinosaur remains are members of Ornithischia, the “bird-hipped” group that includes many well-known herbivores. The newly identified animal belongs to the hadrosauroid line – a broader family of duck-billed dinosaurs.

A rare find: a partial skeleton that “hangs together”

According to the research team’s account, the site that produced the new species was first recognised in 2022, helped by the exposure created by a newly built forestry road. While mapping the local geology in search of fossil-rich layers, the team noticed dark grey sand deposits similar to bone-bearing strata known from other Hațeg Basin sites. Excavations there proved unusually rewarding.

Instead of finding only isolated bones, the researchers uncovered a partial skeleton from a single hadrosauroid individual, with multiple elements that belong together. This matters because in the Hațeg Basin, associated skeletons are extremely rare, and hadrosauroid fossils are often represented by single, scattered bones that can be hard to assign to a species with certainty.

Why it had been “hidden” for so long

Hadrosauroid remains from Transylvania have been known for more than a century, and many finds were routinely attributed to the species Telmatosaurus transsylvanicus, described over 130 years ago. But the team behind the new discovery says that assumption could persist partly because the best diagnostic material – especially skull bones combined with vertebrae and limb elements – is seldom recovered in one piece.

To resolve this, the researchers first worked to redefine Telmatosaurus and its known remains, then carried out a detailed comparison with the newly excavated skeleton. The conclusion: the Valiora specimen does not match Telmatosaurus, and represents a distinct new species that appears to have lived slightly earlier, possibly by one to two million years.

What the name means – and what it suggests about dinosaur migrations

The newly described species has been named Kryptohadros kallaiae. The researchers explain that the “Krypto-” element reflects how this dinosaur remained effectively “hidden” in the shadow of Telmatosaurus for decades, while the species name honours Csilla Kállai, the late mother of the study’s first author, who supported his early interest in the natural sciences.

The team notes that because the two dinosaurs are close relatives, they share many similarities, with differences most visible in the morphology of skull elements. Beyond describing a new species, the researchers also report a broader evolutionary result: their phylogenetic analyses suggest Kryptohadros is most closely related to Tethyshadros, a dinosaur known from northern Italy.

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Together with Telmatosaurus, these species form a distinctive lineage associated with south-eastern Europe, which the researchers refer to as Telmatosauridae. They add that their results are consistent with the idea that hadrosauroid dinosaurs of Asian origin reached Europe and then spread further through multiple migration events, shaping the fauna of the Late Cretaceous island world.

Why this discovery matters

For Hungary’s research community, the find is a reminder of how much remains to be learned from long-term fieldwork and careful anatomical study, especially in places where complete skeletons are scarce. For the wider public, it adds a new name to the roster of dinosaurs known from Europe’s Late Cretaceous – and supports a growing scientific picture of dynamic, changing island ecosystems rather than a static, limited fauna.

The researchers say the new species is another piece of evidence that the “Hațeg Island” world at the very end of the Cretaceous was richer and more varied than earlier reconstructions suggested.

Publication and images

The study describing the new species was published in the Journal of Systematic Palaeontology. The press materials accompanying the announcement include excavation photos from the Valiora site, laboratory images of key bones, and multiple reconstructions illustrating the animal’s skull and body, as well as its relationship to Telmatosaurus and close relatives.

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