👉 Cryptognathini are a group of extinct, prehistoric tetrapods that lived during the Middle and Upper Paleolithic periods. These animals were characterized by their distinctive skulls with two sets of eyes on each side, known as the "pens." Their brains were significantly smaller than those of modern mammals, suggesting a more primitive cognitive system. Cryptognathini were primarily herbivores and had an active social life, likely foraging or scavenging.
