The early Cambrian Period was known for having some weird-looking animals, but even by Cambrian standards, Saccorhytus coronarius was pretty bizarre.
The name is a Greek and Latin composite that means, more or less, "wrinkled bag with a crown," and as disparaging as it sounds I have to admit it's pretty accurate. The reconstruction of it from various fossils makes it look like a design for a new Pokémon that was rejected on the basis of being too outlandish:
Here's the current best-supported arrangement for known animal groups, with the Saccorhytus's branch shown in red:
So that's today's news from the No Ifs, Ands, or Butts department. (Sorry, I'll stop with the middle-school humor. Probably.) Saccorhytus isn't a close relative of ours, but more allied to insects and roundworms. Still, the lack of a hind end means it's not exactly a comfortable fit in that group either. Of course, "if you haven’t got an anus," said study lead author Philip Donoghue of the University of Bristol, "you’re not going to be very comfortable anywhere."
Okay, look, that one wasn't my fault. The scientist himself said it.