An international research team has found an eye system in trilobites of the suborder Phacopina from the Devonian (390 million years B.P.) that is unique in the animal kingdom: each of the about 200 ...
Trilobites of the suborder Phacopina had a unique eye in which about 200 large lenses in each eye spanned at least six individual facets, each of which in turn formed its own small compound eye. An ...
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