''Aegialodon dawsoni'' is an extinct mammal from the early

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

, known from fossilised teeth discovered in the

Wadhurst Clay Formation The Wadhurst Clay Formation is a geological unit which forms part of the Wealden Group and the middle part of the now unofficial Hastings Beds. These geological units make up the core of the geology of the High Weald in the English counties of We ...

(dating to about 136 million years ago) near Cliff End,

Hastings, East Sussex Hastings () is a large seaside town and borough in East Sussex on the south coast of England, east to the county town 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 ...

.Kermack, Lees and Mussett, UCL 1965
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References

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