Navigation Links
Jurassic pain: Giant 'flea-like' insects plagued dinosaurs 165 million years ago
Date:5/1/2012

CORVALLIS, Ore. It takes a gutsy insect to sneak up on a huge dinosaur while it sleeps, crawl onto its soft underbelly and give it a bite that might have felt like a needle going in but giant "flea-like" animals, possibly the oldest of their type ever discovered, probably did just that.

And a few actually lived through the experience, based on the discovery by Chinese scientists of remarkable fossils of these creatures, just announced in Current Biology, a professional journal.

These flea-like animals, similar but not identical to modern fleas, were probably 10 times the size of a flea you might find crawling on the family dog with an extra-painful bite to match.

"These were insects much larger than modern fleas and from the size of their proboscis we can tell they would have been mean," said George Poinar, Jr., a professor emeritus of zoology at Oregon State University, who wrote a commentary on this find in the same journal.

"You wouldn't talk much about the good old days if you got bit by this insect," Poinar said. "It would have felt about like a hypodermic needle going in a flea shot, if not a flu shot. We can be thankful our modern fleas are not nearly this big."

Poinar, who is an international expert in ancient and extinct insect life forms, said it's possible that the soft-bodied, flea-like insects found in these fossils from Inner Mongolia are the evolutionary ancestors of modern fleas, but most likely they belong to a separate and now extinct lineage.

Called Pseudopulex jurassicus and Pseudopulex magnus, they had bodies that were more flat, like a bedbug or tick, and long claws that could reach over scales on the skin of dinosaurs so they could hold onto them tightly while sucking blood. Modern fleas are more laterally compressed and have shorter antennae, and are able to move quickly through the fur or feathers of their victims.

"These are really well-preserved fossils that give us another glimpse of life into the really distant past, the Cretaceous and Jurassic," said Poinar, who has also studied "younger" fleas from 40-50 million years ago preserved in amber.

All true fleas are adapted to feeding on warm-blooded vertebrates, Poinar said, and today 94 percent of the 2,300 known species attack mammals, while the remainder feed on birds. But the unusual characteristics and abilities of the flea-like animals found in these fossils lead scientists to believe their prey were some of the biggest kids on the block dinosaurs in which they could have fed on the softer skin between scales.

Modern fleas, the report noted, have done plenty of damage. Hardly a dog or cat alive has escaped their attack, and they brought mankind such diseases as bubonic plague, which has killed 75 million people.

But their bite itself, at least, didn't feel like a needle going in, by an insect that wasn't even afraid of a dinosaur.


'/>"/>

Contact: George Poinar, Jr.
poinarg@science.oregonstate.edu
541-737-5366
Oregon State University
Source:Eurekalert

Related biology news :

1. Jurassic Park had it right: Some dinosaurs hunted by night
2. Chronic pain: Watch out before accepting diagnosis and treatment
3. Neuropathic pain: The sea provides a new hope of relief
4. I feel your pain: Neural mechanisms of empathy
5. Giant squids giant eyes: The better to see hungry whales with
6. Extinct for 150 years, an iconic Galpagos giant tortoise species lives
7. Giant flakes make graphene oxide gel
8. Tiny fossil fragment reveals giant-but-ugly-truth
9. Giant kraken lair discovered
10. Colossal aggregations of giant alien freshwater fish as a potential biogeochemical hotspot
11. Scientists take a giant step for people -- with plants!
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/21/2019)... , ... January 20, 2019 , ... Energetiq Technology, a ... company, Hamamatsu Photonics, at the SPIE BIOS and SPIE Photonics West events taking place ... will be in booth #8526 at Bios and in booth #941 at Photonics West. ...
(Date:1/20/2019)... ... 2019 , ... January has been a record-breaking month so far for Lajollacooks4u, ... company already hosted several of its signature cooking classes and team-building events, but it ... this month. , Since 2008, Lajollacooks4u’s team-building events have been a favorite for ...
(Date:1/14/2019)... ... January 14, 2019 , ... ... detect precancer and cancer cells in blood, will present new findings at the ... the fight against colorectal cancer. The results from this study show CellMax Life’s ...
Breaking Biology News(10 mins):
(Date:2/16/2019)... ... February 14, 2019 , ... DaVinci ... sharing capability that also provides the flexibility for users to bring their own ... provides a shared workbench to conduct quick analytics on near-real-time data to gain ...
(Date:2/6/2019)... ... 05, 2019 , ... Firmex announced today that VERTU Capital ... Firmex, one of the fastest-growing and most widely-used providers of virtual data rooms ... financing was provided by the Bank of Montreal. , Headquartered in Toronto, Canada, ...
(Date:2/2/2019)... ... , ... Signature Matrix and Signature Cord are the culmination ... cell research expert and Amazon best-selling author, Neil Riordan, PA, PhD, and his ... allograft that originates from the same tissue used to manufacture the purified, expanded ...
(Date:1/30/2019)... ... January 29, 2019 , ... ... and Manufacturing Organization (CDMO) serving the global biopharmaceutical and biotechnology industries with sites ... $59.1 million backed by multiple global investors lead by China's State Development & ...
Breaking Biology Technology: