Scientists Identify 96-Million-Year-Old Nipponopelta as Japan's First Formal Ankylosaur
Updated
Updated · Sci.News · Aug 25
Scientists Identify 96-Million-Year-Old Nipponopelta as Japan's First Formal Ankylosaur
1 articles · Updated · Sci.News · Aug 25
Summary
Decades-old fossils from Hokkaido have been formally named Nipponopelta yezoensis, the first ankylosaur ever described from Japan and a Late Cretaceous nodosaurid that lived about 96 million to 94 million years ago.
3D CT scans of the partial skull, vertebra and teeth revealed hidden anatomy—including part of the lower jaw, two intact teeth and the left inner ear—allowing researchers to distinguish a new genus and species.
The skull's rear features and phylogenetic analysis place Nipponopelta among derived nodosaurids from North America and Europe, rather than with the few other Asian nodosaurids identified so far.
Habitat and dispersal modeling suggests its lineage spread across a broad ancestral range and retained a preference for coastal or estuarine, marine-influenced environments, helping explain how nodosaurids moved between regions.