An international team of researchers discovered a family of ancient female spiders with unhatched eggs on their backs and other young.
The find came after investigating four pieces of amber in the Hukawng Valley, located in northern Myanmar.
According to scientists, these pieces found date back 99 million years. Its protagonists are a group of spiders belonging to the now extinct species Lagonomegopidae, which lived in the Northern Hemisphere during the Cretaceous.
The researchers also believe that the trapped spiders would be sisters of the same age, taking into account their small size and morphological characteristics.
The study that analyzed these frozen fossils determined that the females of this species would have built and guarded their egg sacs.
At the same time, the young of Lagonomegopidae they would have remained by their mother’s side for a time after hatching.
“One shows a female lagonomegopid spider grasping an egg sac containing eggs about to hatch (you can see the tiny pre-hatchlings inside the egg sac),” said study author Paul Selden, a professor at the University of Kansas. , on a note from CNN.
“This is exactly what a live female spider in a crack in the bark of a tree would look like (in this case, just before being drowned in tree resin).”
The scientists had to use a CT scan to detect the tiny eyes and other details that revealed the identity of the spider, as well as its tiny 3D offspring.