Ancient wasp snatched prey like Venus flytrap, scientists say
An ancient wasp may have zipped among the dinosaurs, with a body like a Venus flytrap to seize and snatch its prey, scientists reported Wednesday.
The parasitic wasp's abdomen boasts a set of flappy paddles lined with thin bristles, resembling "a small bear trap attached to the end of it," said study co-author Lars Vilhelmsen from the Natural History Museum of Denmark.
Scientists uncovered over a dozen female wasps preserved in 99-million-year-old amber from the Kachin region in northern Myanmar. The wasp's flaps and teeth-like hairs resemble the structure of the carnivorous Venus flytrap plant, which snaps shut to digest unsuspecting insects. But the design of the wasp's getup made scientists think its trap was designed to cushion, not crush.
Instead, researchers suggested the flytrap-like structure was used to hold a wriggly insect still while the wasp laid an egg, depositing a baby wasp to feed on and drain its new host.
"We imagine it would have waited with the apparatus open, ready to pounce as soon as a potential host activated the capture response," lead researcher Qiong Wu said, according to the BBC.
It's a playbook adapted by many parasitic wasps, including modern-day cuckoo and bethylid wasps, to exploit insects. But no known wasp or any other insect does so with bizarre flaps quite like this one.
Researchers from Capital Normal University in Beijing said "nothing similar is known from any other insect," according to the BBC.
"I've seen a lot of strange insects, but this has to be one of the most peculiar-looking ones I've seen in a while," said entomologist Lynn Kimsey from the University of California, Davis, who was not involved with the research.
Scientists named the new wasp Sirenobethylus charybdis, partly for the sea monster from Greek mythology that stirred up wild whirlpools by swallowing and expelling water.
The new study was published in the journal BMC Biology and included researchers from Capital Normal University and the Beijing Xiachong Amber Museum in China.
It's unclear when the wasp went extinct. Studying unusual insects like this one can help scientists understand what insects are capable of and how different they can be.
"We tend to think that the cool things are only found today," said Gabriel Melo, a wasp expert at the Federal University of Paraná in Brazil, who had no role in the study. "But when we have this opportunity, we see that many really exceptional, odd things already happened."
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