Aegialodon dawsoni was a mammal

Mammal

Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...

 from the early Cretaceous

Cretaceous

The Cretaceous , derived from the Latin "creta" , usually abbreviated K for its German translation Kreide , is a geologic period and system from circa to million years ago. In the geologic timescale, the Cretaceous follows the Jurassic period and is followed by the Paleogene period of the...

, known from fossilised teeth discovered in the Wadhurst Clay Formation (dating to about 136 million years ago) near Cliff End, Hastings, East Sussex.

In popular culture

Aegialodon is heavily featured in several chapters of the novel Raptor Red

Raptor Red

Raptor Red is a 1995 American novel by paleontologist Robert T. Bakker. The book is a third-person account of dinosaurs during the Cretaceous Period, told from the point of view of Raptor Red, a female Utahraptor...

, which chronicles a year in the life of a female Utahraptor

Utahraptor

Utahraptor is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period...

, as a fierce predator of scorpions and other arthropods, as well as the ancestor of all living mammals.