👉 Crepidacanthids are a group of extinct, mesopelagic, cephalopod mollusks that lived on the seabed during the Paleozoic era, about 250 million years ago. They were characterized by their large, flattened bodies and a long snout, which they used for capturing prey. Crepidacanthids are known from a few fossil records, including those of the Late Triassic (194-168 million years ago)
