It sounds like something from the 'Alien' movie series, but books that lived during the dinosaurs age put eggs into the fly-puppets, with the booklets flying the flies from within.
The study, published in the scientific newspaper Nature revealed that four new varieties were found in fossil dunes dating back to the palateogen period, about 65 million to 23 million years ago. The female ropes would lay their eggs inside the flight coupons and when the wasps grew, they would harvest the bodies of the flies as nutrition.
The most common varp has been named Xenomorphia resurrecta after the parasitic Xenomorphen in the "Alien" movie series. The other species found are named Xenomorphia handschini Coptera duck and Palaeortona quercyensis .
"Alien" WASPS LAY EGGS NO CATERPILLARAR RUNNING TO THEM
"About 50 [percent] of all animal species are considered parasites," wrote the authors in abstract. "The coupling of species diversity to a parasitic lifestyle is particularly evident in the insecticide hymenoptera. However, fossil evidence of host-parasitoid interactions is extremely rare, which gives hypotheses about the development of parasitism adopted."
The study led by Thomas van de Kamp noted that "evidence of parasitism in fossils is generally rare, as it requires preserved information about interaction between both parties."
The only previous example of a parasitoid wasp inside its preserved host was found in the Quercy region of France, and is about 34-40 million years old, the researchers wrote.
SCIENCES DISCOVER "FREE" IN AMBER FROM 100 MILLION YEARS AGO
The results were made after van de de Kamp and the other researchers looked at the X-ray scanner and then used 3-D modeling to reconstruct what they had seen, according to LiveScience.
Follow Chris Ciaccia on Twi tter @Chris_Ciaccia