Like today's mammals and birds, including our furry four-legged friends, dinosaurs may have been plagued by fleabites. Researchers have discovered the fossilized remains of what they are now calling two species, one of which lived 165 million years ago, and the other 125 million years ago. They were about 10 times the size of today's fleas and sported long, tough mouthparts that were likely able to penetrate the tough skin of a dinosaur. The finding adds to other "dinosaur flea" discoveries, suggesting perhaps a giant flea collar may have been in order.
Here, a compression fossil of the "dinosaur flea" called P. magnus, which rather than an impression fossil is actually the insect remains that have fossilized over time.
The "dinosaur flea" called Pseudopulex jurassicus would have lived about 165 million years ago, using its lengthy and serrated mouthparts to suck the blood of hosts, including dinosaurs.
The monster of the two newly identified "dinosaur fleas," called P. magnus, lived about 125 million years ago. Its body, shown here in a line drawing, extended 0.9 inches (22.8 mm), and it sported serrated mouthparts reaching nearly 0.20 inches (5.2 mm) in length.
The flealike insect called P. jurassicus, shown here in this line drawing, may have fed on the blood of feathered dinosaurs such as Pedopenna daohugouensis and Epidexipteryx hui.
The flealike insects sported saw-blade teeth along their lengthy mouthparts, part of which are shown here from one of the fossils P. magnus.
Shown here, part of the mouthparts of the "dinosaur flea" called P. jurassicus.
The flealike insects, P. magnus and P. jurassicus, resemble the fossils of two other fleas reported in the journal Nature in 2012. Shown here, a male flea fossil from the early Cretaceous period.
A female (left) and male (right) flea from the middle Jurassic in China.