Decades of research has confirmed that for such simple creatures, trilobites had astoundingly complex eyes.
possessed the most sophisticated eye lenses ever produced…. The lens structure does not correspond to any found in modern arthropods, as it developed when trilobites were already a separate stock and doomed to extinction…. Though the trilobites were lavished by nature with this great optical gift, there is no way to know whether the trilobites made full use of it.With some 20,000 known species, trilobites were a diverse bunch that went extinct about 250 million years ago.
which would have helped the trilobites detect light in dark ocean waters, researchers reported in 2021.
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