trace fossil

The team’s findings “are a thrilling study,” says Anthony Martin, a trace fossil expert at Emory University in Atlanta who wasn’t involved in the research.

“Compared to other trace fossils, which are usually only a few tens of centimeters long, this trace fossil was huge,” says Yu-Yen Pan.

“Compared to other trace fossils, which are usually only a few tens of centimeters long, this trace fossil was huge,” says Yu-Yen Pan, a geologist at Simon Fraser University in Burnaby, Canada.

The fossilized guts, or cololites, are a type of trace fossil.