Phacops rana milleri
Trilobita, Trilobite Order
Phacopida, Suborder Phacopina, Family Phacopidae
Lucas County, Ohio
large and pristine example of popular trilobite from Ohio. The Ohio
Phacops trilobites are particularly well known for Schizochroal
eyes that are found only in some Phacopida, those of Suborder
Phacopina. This type of trilobite eye typically has fewer lenses,
but they are much larger. Each lens is separated and has an individual
cornea. The picture attests to the unusual "crystal eyes"
of this Phacopida and their superb preservation.