The Jurassic "Squid Butt" That Broke All The Rules

If you ever find yourself wandering through the rugged landscapes of Wyoming, you might stumble upon something paleontologists affectionately call "squid butts."

No, really! That’s the local nickname for belemnites—fossilized internal skeletons of extinct marine animals related to modern squids and octopuses. Usually, these fossils look like slim, little bullets. But recently, researchers found something that looked less like a bullet and more like a tiny, prehistoric barrel.

Not Your Average Cephalopod

Meet Wyoteuthis linsterorum. That’s a mouthful, I know, but it’s the official name for this newly discovered species.

While most belemnites are narrow and sleek, this guy was... well, chunky. Scientists found that its internal skeleton was incredibly thick. While your average belemnite might only be 1 or 2 centimeters wide, this specimen was a whopping 6 centimeters across. It was basically the "bodybuilder" of the Jurassic seas.

A 30-Year Cold Case

What I find most fascinating about this story isn't just the creature itself, but the sheer amount of patience required to find it.

This isn't a brand-new discovery in terms of when it was dug up. The first specimen was actually spotted back in the late 1990s! But it sat in a museum drawer for decades, just waiting for someone to realize it wasn't a "normal" fossil. It took the discovery of a second specimen by a collector named Cliff Linster to finally give scientists enough evidence to say, "Wait a minute, this is something entirely new!"

Why was it so "Buff"?

You might be wondering: Why would a squid evolve to be so stout?

The researchers think it might have been an evolutionary superpower. By being larger and sturdier, Wyoteuthis might have been able to hunt other, smaller species of belemnites. If you've ever watched a modern squid hunt, you know they aren't exactly picky eaters—they'll eat almost anything that swims by. This chunky Jurassic version was likely the apex predator of its tiny, underwater neighborhood.

Why This Matters

It’s easy to think we’ve seen it all when it comes to fossils, but this discovery proves that the Earth still holds massive secrets. By using high-tech CT scans to peer inside these rocks, scientists are finding "ghost" lineages—families of animals that were thought to have gone extinct millions of years before this chunky guy even showed up.

It just goes to show: sometimes, you have to look a little closer at the "weird" stuff to uncover the real story of life on Earth.