Researchers have long assumed that a tube in the famous Pikaia fossil ran along the animal ... fleshy appendages hanging down from the front end of its body. Living polychaetes have similar ...

An almost overlooked fossil discovered in a Brazilian ... “I was just shocked to see that weird projection in front of this (insect’s) head,” Lepeco, the study’s lead author, said.

The predator likely used its wide, flat head and front teeth to suck in and chomp ... of Chicago who was not involved with the work. Fossil remnants of four creatures collected about a decade ...