Ancient 'Platypus-Like' Mammal Fossil Unearthed in China

Ancient Mammal Fossil Sheds Light on Jurassic Life

A remarkably well-preserved fossil discovered in Inner Mongolia, China, is providing scientists with new insights into the evolution of mammals during the age of dinosaurs. The creature, named Megacauda sungei – meaning “big tail” – lived approximately 163 to 168 million years ago during the Middle Jurassic period.

A Unique Blend of Features

Megacauda sungei was roughly the size of a modern platypus, weighing between one and two kilograms. Researchers describe it as having a body similar to that of a platypus, an otter-like tail, and a canine head. This combination of traits suggests an early adaptation to a semi-aquatic lifestyle.

Early Signs of Advanced Feeding Mechanisms

The fossil exhibits the earliest evidence of bony structures in the throat – specifically the hyoid bones – that enabled Megacauda sungei to chew, swallow, and potentially suckle like modern mammals. This development is considered a significant evolutionary innovation, allowing for dietary diversification among early mammal species.

A Top Predator of its Time

The fossil's teeth show curved cusps likely used for catching slippery prey, as well as specialized canines with three roots instead of two. Researchers believe Megacauda sungei was a top predator in the Jurassic waterways. The creature’s soft palate allowed it to swallow food against gravity and safely consume milk, potentially contributing to brain development later on.

Discovery Details

The fossil was initially found by local farmers in the Daohugou area of Inner Mongolia. Paleontologists Zhe-Xi Luo from the University of Chicago and Thomas Martin from the University of Bonn have been regularly examining finds at the nearby Paleontological Museum of Liaoning, where this specimen was identified a decade ago.