Clay-Template Reveal: Edmontosaurus Hoofs and 3D Anatomy Uncovered

66 million years ago in Wyoming, a duck-billed dinosaur collapsed beside an ancient river. A flash flood buried it in wet sediment, and a skin biofilm drew clay from the mud to form a wafer-thin three-dimensional mask that captured every scale. As flesh decayed, the clay template remained, letting palaeontologists reconstruct Edmontosaurus's appearance in exquisite detail. The team from the University of Chicago and collaborators reveal a fleshy neck crest, spikes along the tail, tiny scales under unusually thin skin, and wedge-shaped hoofs at the feet—the earliest hoofs found in land vertebrates. This preserved portrait shows what Edmontosaurus truly looked like, revealing a giant from the age of dinosaurs.

Introduction

In a succinct feature, scientists describe how a single fossil preservation event can illuminate a long extinct animal. The Edmontosaurus specimen becomes a case study in reconstructing life from traces of sediment and mineral mask.

Preservation Process

A biofilm on the dinosaur's skin drew clay from the surrounding mud, creating a wafer-thin clay template that recorded three-dimensional details of every scale and contour. When the flesh decayed, the template remained, enabling a near- anatomical reconstruction.

Anatomical Revelations

The reconstruction reveals a fleshy neck crest, a line of spikes on the tail, and notably, wedge-shaped hoofs at the feet—the earliest known hooves in land vertebrates, signaling a major shift in our understanding of Edmontosaurus's locomotion and appearance.

Implications

By showcasing a complete portrait of a giant from the dinosaur age, the findings from the University of Chicago and collaborators reshape our view of Edmontosaurus and demonstrate how preservation quirks can unlock new biological details.