👉 The term "Eriorhynchidae" is defined as a group of extinct, large carnivorous mammal-like creatures that lived during the Cretaceous period (about 68 to 65 million years ago). These creatures were characterized by their massive jaws and teeth, which they used to tear through vegetation. Eriorhynchids are thought to have been nocturnal predators, with a diet consisting mainly of small mammals and reptiles.