Name: Alphadon ‭(‬First tooth‭)‬.
Phonetic: Al-fah-don.
Named By: George Gaylord Simpson‭ ‬-‭ ‬1927.
Classification: Chordata,‭ ‬Mammalia,‭ ‬Marsupialia,‭ ‬Ameridelphia,‭ ‬Didelphimorphia.
Species: A.‭ ‬marshi‭ (‬type‭)‬,‭ ‬A.‭ ‬attaragos,‭ ‬A.‭ ‬austrinum,‭ ‬A.‭ ‬clemensi,‭ ‬A.‭ ‬eatoni,‭ ‬A.‭ ‬halleyi,‭ ‬A.‭ ‬jasoni,‭ ‬A.‭ ‬lillegraveni,‭ ‬A.‭ ‬marshi,‭ ‬A.‭ ‬perexiguus,‭ ‬A.‭ ‬sahnii,‭ ‬A.‭ ‬wilsoni.
Diet: Omnivore.
Size: Estimated about‭ ‬30‭ ‬centimetres long.
Known locations: Canada,‭ ‬USA.
Time period: Campanian to Maastrichtian of the Cretaceous.
Fossil representation: Teeth.

       Although Alphadon is only named from teeth,‭ ‬these are very similar to possums.‭ ‬Combined with our current knowledge of other late Cretaceous mammals,‭ ‬palaeontologists have concluded that Alphadon was probably a possum-like mammal that fed upon a variety‭ ‬of insects and fruits.‭ ‬Additionally Alphadon is classed as a marsupial which means that young would have been kept in a body pouch.‭ ‬Late Cretaceous North America was a dangerous time for the early mammals and smaller ones like Alphadon would have been easy prey for dinosaurs like Troodon.‭ ‬With this in mind it likely stayed amongst the undergrowth or high in trees where it could either not be seen or simply out of the way of the dinosaurs.


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