Scientists first discovered the eggs of the ancient trilobite directly from the remains of extinct creatures.
Comparing their location, trilobites reproduce using sexual holes in the head.
A group of American paleontologov led by Thomas Hegna from Western Illinois University, studying the remains of the trilobite Triarthrus eatoni, directly at the head of the animal found a few tiny spheres with a diameter of about 200 microns.
The specimen is well preserved during the fossilization of hard parts of the exoskeleton of the animal and eggs were replaced by iron-bearing mineral pyrite.
It turned out that the eggs that scientists can see directly on the trilobite. Comparing their location, researchers have concluded that these creatures were bred using sexual holes in the head. Do today, some horseshoe crabs are ancient marine arthropods, which are relatives of trilobites.
It is worth noting that trilobites lived in the oceans during the Paleozoic, but became extinct these creatures about 250 ml years ago. Their remains huge amounts of archaeologists, which gives scientists the opportunity to study in detail all aspects of the lives of these marine arthropods.
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