Didelphodon Kingdom Animalia (animals) Phylum Chordata (animals with spinal nerve cords) Subphylum Vertebrata (chordates with backbones Class Mammalia (mammals) Subclass Theria (advanced animals) Infra Class Metatheria (pouched animals) Order Marsupialia Suborder Didelphimorphia (opossums) Family Didelphidae Genus Didelphodon (opossum tooth) Species vorax

Meet the Didelphodon

Didelphodon was a small creature that lived among the forests of the Late Cretaceous Period around 65 million years ago, along with T. rex, Triceratops and the duckbill dinosaurs.

If you have ever seen an opossum, you know what Didelphodon might have looked like. Though no one has found anything more than a few pieces of a Didelphodon - fossilized teeth, jaw and skull fragments - scientists have speculated that it resembled today's opossum in shape and size. In fact, the name Didelphodon means "opossum tooth."

In Dinosphere, you will see a fossilized Didephodon jaw bone and two models of a complete Didelphodon.

Didelphodon is a mammal, not a dinosaur. Despite its small size, Didelphodon was among the largest mammals in the world 65 million years ago. But dinosaurs ruled the land and even the largest mammals were an easy target.

Didelphodon likely burrowed in the ground and slept during the day for protection. At night, it relied on its keen sense of smell and good vision to scavenge for insects, small reptiles, amphibians, other mammals, or dinosaur eggs. Its teeth were especially suited for crushing, so it could probably feast on hard-shell clams, snails or baby turtles.

Like today's kangaroos and koalas, Didelphodon was a marsupial and probably carried its young in a pouch. Although marsupials are found today mostly in Australia and South America, Didelphodon fossils have been found only in North America.

Interesting Things About Didelphodon

The discovery of the Didelphodon jaw is important because it is the first Didelphodon jaw containing teeth.

The jaw will help scientists determine the size, position and number of its other teeth, and will serve as a useful comparison tool when studying other early mammals.

The Didelphodon's Discovery

Barry Brown was searching for fossils in 2001 in Harding County, South Dakota, when he spotted a small area of eroded rock that was filled with "micro material" - tiny fossilized bones, teeth and claws from mammals, fish, amphibions, reptiles and dinosaurs. Included in the fossilized material was the Dinosphere Didelphodon jaw.