The strangest recent animal discoveries

LiveScience updates its compilation of the weirdest recent discoveries from the animal kingdom. These include new species and discoveries about species we knew - or thought we knew.
There are the extinct animals: a tulip-shaped creature that filtered water through its head and a tiny beast what was wholly preserved even though it had no bones: in other words, a very rare discovery of a soft-tissue fossil. There was also "Predator X," Pliosaurus funkei,T a mosasaur 12-13m loing with teeth that dwarfed T. rex's.
There are the new discoveries concerning known animals: no one knew the cute little gray mouse lemur was a cannibal.
There's a 3-cm-long millipede with 750 legs. There are snakes with sensing tentacles on their heads, a Vietnamese fish with its penis on its face, a carnivorous sponge that looks like a beautiful living harp, a mouthless zombie worm, a two-headed shark (ok, that one was a fluke), and a charming video of a boa constrictor eating a howler monkey - whole, of course. 
If you greatly speeded up evolution into some kind of time-lapse movie, you'd see Nature seemingly throwing around DNA at random - sometimes hitting a dead end, but sometimes doing rather crazy things.