This Ancient Invertebrate Had a Nightmare Mouth

Fascinating stuff here.

Paleontologists reveal one of the scariest sets of jaws to have ever evolved But how did these creatures eat? Vinther and colleagues include a three-step "sequence of eversion" in their paper. The circular structure looks intimidating enough at rest, but Pamdelurion could push their creepy mouth cone outward into a kind of pyramid before flinging open to present their spikes and close around smaller, softer prey. And while Pamdelurion didn't reach Sarlaac size - Vinther and colleagues estimate the invertebrate was a little more than three feet long - the thought of all those plates is unsettling at any scale.