''Aegialodon dawsoni'' is an extinct

mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...

from the early

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

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

Hastings, East Sussex Hastings ( ) is a seaside town and borough in East Sussex on the south coast of England, east of Lewes and south east of London. The town gives its name to the Battle of Hastings, which took place to the north-west at Senlac Hill in 1066. ...

References

Early Cretaceous mammals of Europe Valanginian genera Monotypic prehistoric mammal genera Fossil taxa described in 1965 {{cretaceous-mammal-stub