lo que pudo haber sido útil para detectar presas o depredadores

suggesting a dietary specialization different from that of large carnivorous predators

These deposits are generally interpreted as the result of mass mortality events

en la zona de la actual Antártida

Their limb bones were massive

Archelon ischyros Variant:Unprimed lo que pudo haber sidoArchelon ischyros was a giant sea turtle that lived during the Late Cretaceous period , approximately 8075 million years ago, when much of central North America was covered by a vast inland sea known as the Western Interior Seaway . This animal is considered the largest known sea turtle , and its appearance must have been as impressive as it was unmistakable as it moved through the shallow oceans of that era. Unlike many modern turtles, Archelon did