What land animals existed during the time of the Western Internal Seaway?

4 Answers

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  • 3 weeks ago

    Various dinosaurs, including avian dinosaurs, and early placental mammals.

  • 4 weeks ago

    None which have anything to do with Astronomy & Space.

    Go ask in Anthropology.

  • Robert
    Lv 6
    4 weeks ago

    Dragons, unicorns, and sea trolls.

  • KennyB
    Lv 7
    4 weeks ago

    The Western Interior Seaway formed 100 million years ago in the mid-Cretaceous and covered parts of North America.

    From Wikipedia:

    On land, mammals were generally small sized, but a relevant component of the fauna, with cimolodont multituberculates outnumbering dinosaurs in some sites. A variety of non-marsupial metatherians and non-placental eutherians had already begun to diversify greatly, ranging as carnivores, aquatic foragers and herbivores.

    The apex predators were archosaurian reptiles, especially dinosaurs, which were at their most diverse stage. Pterosaurs were common, but as the Cretaceous proceeded they declined for poorly understood reasons (once thought to be due to competition with early birds).

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