👉 Helictidinae is a family of extinct, extinct or near-extinct chordates that lived during the Eocene and Neogene periods, approximately 65 million years ago to about 34 million years ago. They are characterized by their large head and neck bones (headgirdle), short limbs, and large, flattened bodies. The family is known for its unique adaptations, including a long, flexible neck with a strong jaw that allowed them to reach high places without the need