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(rodent-like omnivores;
183
) similar to
those from the Morrison, coexist with
early placental mammals, such as the early
hedgehog relatives also seen at Messel. An
interesting component of the Hell Creek
fauna are the early marsupials, including
Didelphodon
(
184, 185
), one of the
largest-known Mesozoic mammals, the
size of a badger, and the genus
Alphadon
,
which was rather like a living opossum.
Many marsupials were wiped out during
the K/T event.
183
183 Tooth of multituberculate
mammal BHIGR. Width
6 mm 0.2 in.
184
184 Jaw of the early marsupial
mammal Didelphodon
BHIGR. Length 7 cm 2.7 in.
185
185 Reconstruction of
Didelphodon.
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